SQL Server 2005 connectivity error messages

Artikel
09/27/2005

One of the more visible changes we made in connectivity space for SQL Server 2005 was enhancing error messages reported to the user in case of connection failures. I have seen several cases over the last several months, and in this post I would like to list some of them with the root cause that caused them. The cause may not be the only one triggering a particular error message, and there may be other error messages of interest.

This is a semi-random selection from real cases I investigated. Likely I will post another batch some time in the future, and I would be happy to see replies with additional errors, particularly if the root cause is unclear.

The examples are from various client stacks – ODBC or OLEDB from SQL Native Client or from managed SqlClient.

The exact formatting of the messages will depend on the application you use. Most of the examples below used OSQL, SQLCMD, or SQL Server Management Studio.

Connecting to a server by the server’s name from SqlClient, the server name is aliased to TCP, the server is up and running but it does not listen on TCP (or is not running at all):

An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: TCP Provider, error: 0 - No connection could be made because the target machine actively refused it.) (Microsoft SQL Server, Error: 10061)

Local connection from SqlClient; server is not running:

(a) default instance:

An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server) (Microsoft SQL Server, Error: 2)

(b) named instance:

An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: Shared Memory Provider, error: 40 - Could not open a connection to SQL Server) (Microsoft SQL Server, Error: 2)

Remote connection from ODBC, Windows Firewall is turned on on the server machine but there is an exception for File and Printer Sharing:

[SQL Native Client]Unable to complete login process due to delay in opening server connection

A successful TCP connection from SqlClient to the server was broken due to a TCP keep-alive heartbeat failure (typically indicating problems with the underlying network infrastructure):

A transport-level error has occurred when receiving results from the server. (provider: TCP Provider, error: 0 - The specified network name is no longer available.)

Possibly:

A transport-level error has occurred when sending the request to the server. (provider: TCP Provider, error: 0 - An existing connection was forcibly closed by the remote host.)

OBDC connection attempt when server is not ready to process a new local connection, possibly due to overload:

[SQL Native Client]Shared Memory Provider: Timeout error [258].
[SQL Native Client]Login timeout expired
[SQL Native Client]Unable to complete login process due to delay in prelogin response

[SQL Native Client]Shared Memory Provider: Could not open a connection to SQL Server [121].
[SQL Native Client]Login timeout expired
[SQL Native Client]An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections.

There is a space after server name in the connection string:

osql -E -S "<serverName> ,1433"
Login failed for user ''. The user is not associated with a trusted SQL Server connection.

The server ERRORLOG/EventLog shows something similar to:

2005-08-11 12:46:04.29 Logon       Error: 17806, Severity: 20, State: 2.
2005-08-11 12:46:04.29 Logon       SSPI handshake failed with error code 0x8009030c while establishing a connection with integrated security; the connection has been closed. [CLIENT: <IP address>]
2005-08-11 12:46:04.29 Logon       Error: 18452, Severity: 14, State: 1.
2005-08-11 12:46:04.29 Logon       Login failed for user ''. The user is not associated with a trusted SQL Server connection. [CLIENT: <IP address>]

Remote OLEDB connection using TCP to a server that is blocked by Firewall

HResult 0x274C, Level 16, State 1
TCP Provider: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.

Error: Microsoft SQL Native Client : An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections..
Error: Microsoft SQL Native Client : Login timeout expired.

Remote OLEDB connection using TCP to a server that is either not running or does not have TCP/IP protocol enabled for incoming connections (but is not blocked by the Firewall on the server machine):

HResult 0x274D, Level 16, State 1
TCP Provider: No connection could be made because the target machine actively refused it.

Peter Gvozdjak, SQL Server Protocols

Disclaimer: This posting is provided "AS IS" with no warranties, and confers no rights

Comments

Anonymous
November 10, 2005
What is the value of this blog? You've posted the error messages - likely the messages we are seeing - but there are no suggested resolutions.
Anonymous
November 10, 2005
This is a quick list compiled from the early Beta experience with SQL Server 2005. To get it out quickly I tried to list at least the root cause. I plan to update it with resolutions and more error messages moving forward.

If you encountered any specific message, can you let me know?

I will be glad to work with you on resolution, an updating this blog accoprdingly.

You may also want to check additional blogs posted by Ming Lu from our team, which contain resolution to many of the connectivity problems:

http://blogs.msdn.com/sql_protocols/archive/2005/10/22/483684.aspx

http://blogs.msdn.com/sql_protocols/archive/2005/10/29/486861.aspx
Anonymous
December 01, 2005
I've been getting the following message when trying to run Management Studio Express and also a similar error with Altiris Depoloyment Solutions for Clients 6.5 trying yo connect to SQL Server Express.

An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: TCP Provider, error: 0 - No connection could be made because the target machine actively refused it.) (Microsoft SQL Server, Error: 10061)

My TCP/IP and Named Pipes are both enabled, I've reinstalled everything several times with no luck. I'm just a Tech, and still learning my way around databases so there might be something simple that I missed. :P My boss has only had a couple minutes to help me out and he couldn't come up with anything. Any info you could give would be greatly appreciated, and I will keep you updated as to my failures/success so you can help build your FAQ.
Anonymous
December 06, 2005
Error[provider: TCP Provider, error: 0 - No connection could be made because the target machine actively refused it] indicates that your TCP/IP was not enabled or your sql server was not listening on the appropriate port.
1) After installing SQL Express, by default, TCP/IP was disabled, please see http://blogs.msdn.com/sql_protocols/archive/2005/11/14/492616.aspx to enable remote connection for SQL Express.
2) Please check errorlog to make sure server TCP was enabled.
- Key words indicates server TCP/IP is enabled –

Server is listening on ['any' <ipv4> <Port Number>] or

[ <ipaddress> <ipv4> <Port Number>].

First one is when enabling server “ListenonAllIPs”, and second one is when server listening on individual IP. To further verification, you can test whether sql server is listening on the exact port using "netstat -ano| findstr <PortNumber>".

3)Try to connect to the exact port that server was listening on and see what happens.

If you still face the same problem, please attach your errorlog info and your connection string(eg, you connect through "."/"(local)"/<hostname>, etc.. and whether you specified any protocol prefix(eg, lpc:/np:/tcp:).

Thanks
Ming.
Anonymous
January 02, 2006
The comment has been removed
Anonymous
January 03, 2006
Hi, Bob

As Peter mentioned in the blog, your sql server might not listen on TCP port properly under this situation.Please follow below steps to troubleshoot:
Go to Server Network Utility, if you enabled TCP on the server,you can see TCP/IP is in the "Enabled Protocols" and click properties of it, get which port configured,then

1)netstat –ano |findstr <PortNum>

2)go to server ERRORLOG see whether server is listening on TCP protocol,you should see "SQL Server is listening on TCP" in the log.

3)or use c:Program filesMicrosoft SQL Server90toolsbinnosql /S<Instance>,<PortNum>, see what happens.

4)It sound that you connect to SQL Server using alias, so, please go to SQL Server Client Network Utility,choose "Alias" tab, check whether you configured the same port that server was listening on in the TCP Alias properties.

If you still have further question, please attach the log file and the connection string( how do you make connection).

Thanks!
Ming.
Anonymous
January 19, 2006
This may be plain silly, but I was struggling with this for 30 minutes because I used a small -s instead of a large -S when specifying the server. You get this connectivity error message instead of a command syntax message and believe your network connectivity is the issue.
Anonymous
January 23, 2006
if you try "osql /?" or "sqlcmd /?", you will see:

-S:server
-s:colseparator

Hence, if you make connection like:
"OSQL /s<machinename> /E" it equals to "OSQL /S /E" without specify server and by default it make connection to local default instance.

Thanks!
Ming.
Anonymous
February 04, 2006
Hello guys,

I just downloaded and installed the VWD 2005 Express Edition, i followed the tutorial on the msdn until i got this exact error:

An error has occured while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be cause by the fact that under the default setting SQL Server does not allow remote connections.(provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Sever)

Sorry but i'm in .net i am a asp developer for years now but i use msaccess so no experience in SQL Server.

Thanks,
Junifer.
Anonymous
February 06, 2006
If you need to access the SQL Server back-end from a remote machine you need to enable remote connections. See this for a reference:

http://blogs.msdn.com/sql_protocols/archive/2005/11/14/492616.aspx

Thank you,
Peter
Anonymous
February 07, 2006
I am getting the following error while i try to open a SqlConnection(using C#) if the SQl Server is paused.

Source : .Net SqlClient Data Provider
Message : A transport-level error has occurred when receiving results from the server. (provider: Shared Memory Provider, error: 0 - The system cannot open the file.)

The error number for this err is 4. (SqlException.Number)

However if the open this connection again then i get the following error

Source : .Net SqlClient Data Provider
Message : SQL Server has been paused. No new connections will be allowed.

Login failed for user '(null)'.

So this is correct and the error number for this is 17142.

So my question is why does i get the error number 4 in the first place and the subsequent runs gives the correct error.
Anonymous
February 13, 2006
An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server) (Microsoft SQL Server, Error: 2)

to correct this error in SQLEXPRESS on servername use [servername]sqlexpress, this should work
Anonymous
February 13, 2006
Please give me a solution for the following error, which occured when i am trying to connect sql server2005 from remotely.

An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: SQL Network Interfaces, error: 28 - Server doesn't support requested protocol) (Microsoft SQL Server, Error: -1)
Anonymous
February 14, 2006
Please give me a soluten for the following error when trying to open the migrated DTS-Packages from SQL Server 2000 on the MSDB-Node/Refresh:

TITLE: Microsoft SQL Server Management Studio
------------------------------

Failed to retrieve data for this request. (Microsoft.SqlServer.SmoEnum)

For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&LinkId=20476

------------------------------
ADDITIONAL INFORMATION:

Login timeout expired
An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections.
Named Pipes Provider: Could not open a connection to SQL Server [2]. (Microsoft SQL Native Client)

------------------------------

Login timeout expired
An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections.
Named Pipes Provider: Could not open a connection to SQL Server [2]. (Microsoft SQL Native Client)

------------------------------
BUTTONS:

OK
------------------------------
Anonymous
February 27, 2006
hi, i get this error when i run my project. i am using a remote server. it is running. but i am getting the error when i am adding a webpart to the page. otherwise it is running fine. do clear my bug. thanks.

gokul.
Anonymous
February 28, 2006
The comment has been removed
Anonymous
March 03, 2006
Can someone please help me with this error.

===================================

Cannot connect to CNF52307XV.

===================================

An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: TCP Provider, error: 0 - No connection could be made because the target machine actively refused it.) (.Net SqlClient Data Provider)

------------------------------
For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&EvtSrc=MSSQLServer&EvtID=10061&LinkId=20476

------------------------------
Error Number: 10061
Severity: 20
State: 0

------------------------------
Program Location:

at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection)
at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj)
at System.Data.SqlClient.TdsParser.Connect(Boolean& useFailoverPartner, Boolean& failoverDemandDone, String host, String failoverPartner, String protocol, SqlInternalConnectionTds connHandler, Int64 timerExpire, Boolean encrypt, Boolean trustServerCert, Boolean integratedSecurity, SqlConnection owningObject, Boolean aliasLookup)
at System.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(SqlConnection owningObject, SqlConnectionString connectionOptions, String newPassword, Boolean redirectedUserInstance)
at System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, Object providerInfo, String newPassword, SqlConnection owningObject, Boolean redirectedUserInstance)
at System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection)
at System.Data.ProviderBase.DbConnectionFactory.CreateNonPooledConnection(DbConnection owningConnection, DbConnectionPoolGroup poolGroup)
at System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection owningConnection)
at System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory)
at System.Data.SqlClient.SqlConnection.Open()
at Microsoft.SqlServer.Management.UI.VSIntegration.ObjectExplorer.ObjectExplorer.ValidateConnection(UIConnectionInfo ci, IServerType server)
at Microsoft.SqlServer.Management.UI.ConnectionDlg.Connector.ConnectionThreadUser()
Anonymous
March 03, 2006
Shahid,

This error suggests that (a) your client specifies to use TCP but (b) your server is not listening on the TCP protocol but (or at least not on its default port).

Regarding (a): the TCP protocol is most likely specified in the connection string or in an alias with the name of the target server. Is your intent to use TCP?

If yes, we get to part (b). Most likely you need to enable the TCP protocol on the server, and retsart the server. Instructions on how to do this for SQL Express are in http://blogs.msdn.com/sqlexpress/archive/2005/05/05/415084.aspx. The steps are the same for other SQL Server editions, just "Click on the Protocols for MSSQLSERVER" instead of "SQLEXPRESS" if your server is installed as a default instance (or for the appropriate instance name if it is a named instance).

Peter
Anonymous
March 14, 2006
Hi
When i install Sqlserver Express it doesn't ask about Default or Instance Setup. After installing it connect as ServerNemaSQLEXPRESS
I want to change connection name to just ServerName. What should i do?
Thank you for helping me.
Anonymous
March 15, 2006
The comment has been removed
Anonymous
March 15, 2006
And if you really want to access it through Server=<machinename> you can create an alias through SQL Server Configuration Manager with the name of the machine connecting to your SQL Express.

Thanks,
Peter
Anonymous
March 20, 2006
Has anyone tried accessing a SQL 2005 Enterprise from a local machine with Symantec Client Firewall (v 7.1.0) installed? When trying to update diagrams locally, I get the following message with the firewall enabled:

"A transport-level error has occurred when sending the request to the server. (provider: TCP Provider, error: 0 - An existing connection was forcibly closed by the remote host.) (.Net SqlClient Data Provider)"

* * *

Of course, when disabled, I am able to update diagrams.

Does anyone know of a workaround to update diagrams locally with the firewall enabled? Or, is that just a pipedream?

Thanks.
Anonymous
March 20, 2006
Try specifying the server by its loopback IP address, 127.0.0.1 in the IPv4 case. And let us know the result.

Thanks,

Peter
Anonymous
March 20, 2006
Alternatively, you can use a protocol other than TCP (Shared Memory and/or Named Pipes) if you have it enabled on your SQL Server. By default SqlClient first tries to use Shared Memory on a local machine.
Anonymous
March 20, 2006
For those who gave up, try one more thing:
Start "SQL Server Configuration Manager",
In "SQL Server 2005 Network Configuration" > "Protocols for SQLEXPRESS", Click on the tab "IP Addresses", Change all TCP Port to 1433.
Yes, I mean all, even "IPAll", then it will work!
Anonymous
April 17, 2006
I am getting a very troublesome error using SQLExpresss 2005. I had a developer write an application utilizing SQLExpress 2005, and I can connect to the server, view all the data (customers, orders, setup tables, etc.), I can connect to the database via Access (ODBC), everything works fine until I try and print an order. Then it comes up and says "An error has occured while establishing a connections to the server. When connecting to SQL Server 2005, this failure may be cuased by the fact that under the default settings SQL server does not allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server). I have enabled remote connections, both TCP/IP and named pipes, made sure that both loopback and actual machines IP address are not only active, but enabled, and like I said previously, am able to view & update data through application, but can seem to print. Not sure what is going on. ANY help would be greatly appreciated. Thanks in advance.
Anonymous
April 17, 2006
You need to contact the developer who wrote the Access application. The report you are trying to print is referencing an old linked table most likely. Open the report in design view and select View|Properties and look at Record Source property, this might give you a clue. But in general the report could be referencing an old linked table just about anywhere so you have to dig through the report in design view until you find it.
Anonymous
April 29, 2006
I also have this error message:

An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)

...And I disabled de firewall, added SQLSERVER to Firewall exceptions, executed aspnet_regsql.exe to add the instance and nothing... configuring in options of visual studio environment to setup the instance of SQL Server 2005... I have this backgrouds: I have installed SQL Server 2000 and Visual Studio .NET 2003 and I have not SQLEXPRESS Edition but SQL Server 2005

What should I do??

Thsnks a lot...
Anonymous
May 02, 2006
If you are trying to remote connection to Sql Server 2005, you need to enable your TCP/IP Protocol in your SQL Server Configuration Manager.

SQL Server Configuration Manager
-> SQl Server 2005 Network Configuration
-> Protocols for <instance>

After enabling the TCP/IP, you need to restart the SQL Server for the changes to be in affect.
Anonymous
May 06, 2006
When my PC connecting the SQL Server 2005,
the Error occurred as follows:
An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005,this failure may be caused by the fact that under the default setting SQL Server does not allow remote connections.(provider:Named Pipes Provider,error:40 - Could not open a connection to SQL Server)(Microsoft SQL Server,Error:53)

But others pc could connect it!
The TCP/IP is enabled state and Named Piped is enabled state
Anonymous
May 07, 2006
An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server)
Anonymous
May 08, 2006
Jinn,

Error code 53 often indicates that the server is not reachable from the client machine. If you run the following two commands on the client machine, what do you get (I assume the server is installed as a default intsnace):

telnet <serverMachineName> 1433

ping <serverMachineName>
Anonymous
May 08, 2006
Srinivas,

Are you able to retrieve the Number member of the SqlError objact in the SqlErrorCollection contained in the SqlException thrown?
Anonymous
May 20, 2006
Does anybody know how to fix the following:

Unable to complete login process due to delay in
prelogin response.

This seems to happen every 1-2 hrs and we have to restart the SQL service, then it is fine.

We usually use tcp/ip for our connections.

When the server starts refusing connection on tcp/ip, we can still connect using namedpipes or the dedicated admin port (tcp 1434).

A few sites mention the erro but no-one can suggest a fix or even further routes for investigation.

Thanks in advance
Anonymous
May 29, 2006
"An error has occurred while establishing connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: HTTP Provider, error: 0 - )"

This occurs randomly, but always under heavy client load. I suppose client first tries some other "provider", but fails, and HTTP provider isn't configured.
Anonymous
May 30, 2006
I am getting the following error when trying to run an ASP.NET 2.0 application using a connection to SQL Server 2000,

An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: Shared Memory Provider, error: 40 - Could not open a connection to SQL Server)

I don't understand why the application is trying to connect to SQL 2005 server when it is not specified.

Thanks.
Anonymous
May 30, 2006
The comment has been removed
Anonymous
May 30, 2006
Additional note, this error message tends to confuse alot of customers with the SQL 2005 part. The error message can occur when you attempt to connect to ANY version of SQL Server, it does not mean that the driver is trying to connect to some SQL 2005 server.
Anonymous
May 30, 2006
If you are connection to a local sql server using SqlClient try using Server Name as '.' this worked for me.

But i am not able to connect to the remote server running sql server 2000. I also tried modifying the HOSTS file still not able to work out. Please drop a mail on my website if someone finds something. thanks.
Anonymous
June 09, 2006
I had problems connecting to my SQL Server edition that came with Visual Web Developed 2005 Express Edition version. The error was that a remote connection could not established error: 40. I solved it by opening SQL Server Configuration Manager explan SQL Server 2005 Network Configuration clicked on Protocols for SQLEXPRESS to find that Shared Memory was enabled but TCP/IP wasnt and once I enabled it, the connection was established.
The server is running in the same machine as the development environment.
One additional thing to note is that you should give <<server or machine name>>SQLEXPRESS as your data source while trying to add a connection
Anonymous
June 21, 2006
Hi Ming,

I get the error:
[sqsrvres] printODBCError: sqlstate = 08S01; native error = 2746; message = [Microsoft][SQL Native Client]TCP Provider: An existing connection was forcibly closed by the remote host.

followed by several these other errors
[sqsrvres] printODBCError: sqlstate = 08S01; native error = 40; message = [Microsoft][SQL Native Client]TCP Provider: The specified network name is no longer available.
[sqsrvres] printODBCError: sqlstate = 08S01; native error = 40; message = [Microsoft][SQL Native Client]Communication link failure
[sqsrvres] OnlineThread: QP is not online.
[sqsrvres] CheckQueryProcessorAlive: sqlexecdirect failed

and it looked to me like it is potentially related to : A successful TCP connection from SqlClient to the server was broken due to a TCP keep-alive heartbeat failure (typically indicating problems with the underlying network infrastructure)

that you mentioned from above i was wondering what type of network problems could be affecting my cluster? I have disabled Netbios/wins and only have Named Pipes and TCPip on the server...also when i shut down the passive node on my cluster the errors will still pop up... I assume the issue has something to do with the heartbeat on the active machine but thus far have been unable to determine the cause of the error. Also to note...when i enable netbios/wins the problems happen more frequently from once a day to multiple times an hour. Using server 2003 x64 sp1 and sql 2005 sp1 x64

Thanks
Anonymous
June 21, 2006
I want immediate answer on this. Plz help
Anonymous
June 21, 2006
Hi Ming,
Me too trying to connect to SQlServer 2000
But am getting the same error.Could u plz tell how to solve it! I tried checking off "enable shared memory protocol".But it didnt worked out

Thanks in advance
Anonymous
June 22, 2006
Hi,Anita

Did you get error: "TCP provider: An existing connection was forcibly closed by the remote host"? Did you make remote connection or local connection. To solve this: you need check several things:

Server side:

1)Go to services.msc, see whether you sql 2000 was started successfully.
2) Go to server error log, see whether TCP was enabled and server is listening on <ip>,<port>
3) netstat -ano | findstr "<port>" double check server was listening on the exact port
4) If you were making remote connection, double check <port> is in the firewall exception list.

Client Side:
5) Try telnet <serverip> <port> see whether it succeeds.
6) Try change your connection string if you have "tcp:" prefix, remove the prefix,see what happens.
7) Try change your connection string to " Server = <machinename>[<Instance>],<serverport>/ or Data Source = <machinename>[<Instance>],<serverport>"

If it is local connection, <machinename> is local hostname, if it is remote connection, <machinename> is remot host name; <port> is the portnumber that server was listening on; <Instance> is the instance name of your sql server, your sql 2000 is default instance or named instance? If default instance, the port should be 1433, if named instance, see the errorlog to check.

If you have further question:
1) Please give me what error you saw?
2) Your connection string?
3) Client/Server OS?
4) server errorlog?
5) local/remote connection?

Good Luck!
Ming.
Anonymous
June 22, 2006
Hi, Sonu

Sorry, I did not see the question you posted? Could you give more specific info?

Thanks!
Ming.
Anonymous
June 25, 2006
Hi All

I have been having the same error I have narrowed it down to being the SQL Server Express 2005 not switching on properly.

These are my issues, everytime i go to the sql server configuration manager and switch on the sql server (sqlexpress) it say

"The request failed or the server did not respond in timely fashion. Consult the error or other application error log"

I get a different error when I try and start the SQL server (sqlexpress) in the Sql server 2005 surface interface configuration tool the error is:

"An error occurred while performing this operation"

I then get this error when I try and start SQL SERVER (SQLEXPRESS) in the services tool

"The SQL SERVER (SQLEXPRESS) on your local computer started and then stopped. Some service stop automaticly if they have no work to do, for example, the performance log."

Now when I try and connected to the sql server Management studio express I get this error

"An error has occured while establishing a connection to the sql server. When connecting to SQL sever 2005, this failure may be caused by the fact that the default setting sql server does not allow remote connections. (provider, name pipes provider, error: 40 - Could not open a connection to sql server) (microsoft sql server Error: 2)

Which is the same error I get when I try an use one of my websites which interacts with an sql server 2005 express database.

So what have I tryed so far to fix this problem, well I have enable TCP/IP and Name pipes in the sql sever configuration manager under SQL server 2005 network configuration / protcols for sql server express

I have also set up the sql server browser to automatic which is working fine.

I have setup sql server (slqexpress) to manual and that still switch off like above. There seems to be lots of people out there with this issue.

WHAT I AM TRYING TO FIND IS A WAY OF STARTING SQL SERVER USING THE COMMAND PROMPT?????

I need to sort this problem out ASAP.

Does anyone know how to do this??
Anonymous
June 26, 2006
Hi Ming,

I think Sunu is referring to my post on 6/21/2006 immediately above his. Let me know if you need any more information. I have found several forums posting similar errors however have not found a solution to it yet :( Let me know if you would like any additional information ...also i would like to remove the comment that removing netbios helps...it seems like maybe i just had a lucky streak cause the errors are persisting. It seems so random. It doesn't coincide with backups or dbcc commands that we're running and the machine isn't being stressed at all....

plz help
Anonymous
June 26, 2006
In response to thomas' post
NET START MSSQLSERVER
NET START SQLSERVERAGENT
also note that if you start SQLSERVERAGENT that it will automatically attempt to start the dependant service MSSQLSERVER

Also i see the improper switching to be a result of the errors not a cause... I have found that sometimes when i get this error my cluster service will be unable to communicate with SQLServer (even though it's on the same machine) and restart the sql service if it can't connect in a reasonable amount of time.
Anonymous
June 26, 2006
The comment has been removed
Anonymous
June 26, 2006
Hi, Nam

From your description, this looks like not a cluster issue. The error you saw probably is due to server close the connection, could you check server errorlog or system event log see whether there is any useful info to provide clue?

Also, we need more detail info about your scenario to identify the problem, could you help follow the below guidline and post your answer to the question?

http://blogs.msdn.com/sql_protocols/archive/2006/04/21/581035.aspx

Thanks!
Ming.
Anonymous
June 26, 2006
Hi All

I fixed the problem I unistalled sql server 2005 express and reinstalled everything is working fine now. Thanks for the advice. Keep up the good work

regards.
Anonymous
June 28, 2006
The comment has been removed
Anonymous
June 28, 2006
Hi,
I'm getting error msg:(provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server) while using webparts in my web app.I guess this has something to do with the point that connection string while connecting with aspnetdb in case of web parts uses windows authentication.
I'm also not able to connect to any other db if i use windows authentication in my connection string.
Can u plz suggest me any solution for it?

Thanks
Regards,
Ritu
Anonymous
June 29, 2006
Hi, Ritu

Can you provide the connection string? Please following the below blog and search the error message to see the troubleshoot tips.

http://blogs.msdn.com/sql_protocols/archive/2005/12/22/506607.aspx

Good Luck!
Ming.
Anonymous
June 29, 2006
Hi, Nam

Thanks for your detail info.
So,

First, it is remote connection, how do you telnet? telnet <server> <sqlport>? If your sql instance is a named instance, you should go to server errorlog to check server TCP/IP was enabld and listening on which port; if your sql instance is default instance, you just try port 1433. Did you try to telnet the correct port? Plus, the <server> must be the hostname of your remote server.

Secondly, if your sql instance is named instance, did you specify the instance name in your connection string? Normally, you should specify "<remoteserver><instancename>"

Thirdly, you mentioned you specify the alias, how does it looks like? did you make connection by using alias or use "<servername><insatncename>"? Please double check whether you spcify the correct sql port number in your alias, that might cause client connect to a tcp port that sql instance was not listening on.

Fourthly, to make remote connection and your remote server has firewall enabled, you need add sql port and browser udp port to the exception list, so, either you add sqlservr.exe and sqlbrowser.exe to exception list or edit the port directly to the exception list. After this done, see whether you can make connection.

Finally, for a quick workaround is by specifying the port number in your connection string, namely, "<servername><instancename>,<sqlport>", on your server " netstat -ano |findstr <sqlport> " to see server was listening on the port.

Let me know if you have further question.

Good Luck!!
Ming.
Anonymous
June 29, 2006
Asaspal. Memrano tu es besta. Amigo.
Anonymous
June 30, 2006
Hey Ming,

default port and default instance also i can telenet into the machine. Not using an alias just the virtual server name that we set up with the cluster. Also no firewall everything is connecting from in the same domain.

The problem isn't that we can't connect, we can connect 99% of the time. It's just that about once a day we lose connection for about 1 minute and get the errors listed above.

Also since i expanded the page file the problem still persists. :(
Anonymous
June 30, 2006
Hi

I fixed my error 40 by turning off user instances and re editing the connection string in my C# project.

Hope this helps.
Anonymous
July 03, 2006
Hi, Nam

One way to identify the 1% connection lose is to open SQL trace file, and see when you got repro, what operation are your client app doing and what was going on on the server...

Thanks!
Ming.
Anonymous
July 05, 2006
Your article is quite right, thanks.
Anonymous
August 01, 2006
Changing the OSQL command switch from -S to -s -S fixed this issue for me. Not sure why, but with -S serverinstance we got the can't find instance error message but with -s it worked.

Thanks to SqlRick who pointed this out early in the thread.
Anonymous
August 10, 2006
The comment has been removed
Anonymous
August 10, 2006
Hi Ming,
This is further to my previous query,I get the following error when i try to login with sa.

Login failed for user 'sa'. The user is not associated with a trusted SQL Server connection. (Microsoft SQL Server, Error: 18452)

Thanks
Anonymous
August 10, 2006
Kamate,
"Cannot connect to PS0654SQLEXPRESS. .."
Mostlikely, this is because you are connect to the SQLExpress remotely and the remote protocol is not enable for sqlexpress. Please use SQL Server Surfuce Configuration Tool to enable remote protocol.

"Login failed for user 'sa'. The user is not associated with a trusted SQL Server connection. (Microsoft SQL Server, Error: 18452)"

What is you connection string, you can either use SQL login with UID and Password or use windows integrated authentication, not both. Make sure that SQLExpress authentication mode is "mix" and you have correct SA password is you decide to use SQL login.
Anonymous
August 11, 2006
Strange might it sound that, I have this issue with the SQL server connectivity from the .net application. The application seems to connect fine fromthe staging system. but throws up an exception from the development

Error number : 18452
Error : User not associated with the SQL Server trusted connnection..

Checked for the authentication its configured to mixed as mentioned in the microsoft website. Is there any other option i am missing here for i am getting this error????
Anonymous
August 13, 2006
"Login failed for user 'sa'. The user is not associated with a trusted SQL Server connection. (Microsoft SQL Server, Error: 18452)"

I have the same problem -- how does one specify "mix" for SQLExpress authentication mode? I already allow both remote and local connections via the Surface Area Configuration -- and "Using both TCP/IP and Named Pipes" is set.
Anonymous
August 15, 2006
In SQL Server Management Studio, when I tried to connect to the Analysis Services database located on a remote server, it gives me the following error:
A connection cannot be made. Endure that the server is running.
(Microsoft.AnalysisServices.AdomdClient)

Additional Information:
-- Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host. (System)
-- An existing connection was forcibly closed by the remote host (System)

What should I do?

Thanks.
Anonymous
August 16, 2006
Hi, masaki

The error indicated that
1) you might have no TCP protocol enabled on remote server, double check SQL configuration manager, see whether remote server was successfully started.

2) See server error log, check which tcp port server is listening on? Try telnet <remoteserver> <port>, and double check whether the port was added to firewall exception list.

3) Try osql /S<remoteservername>,<port> /E, see whether it works? If so, open trace file see what operation cause server reset connection, and see eventlog and server errorlog to get clue.

Good Luck!
Ming.
Anonymous
August 16, 2006
The comment has been removed
Anonymous
August 17, 2006
OLE DB Provider returns error “General network error (80004005)” – Communication link failure when Job scheduler runs long taking DTS package via TSQL command. DTS package makes UPDATE against big table. This error can issue any time during long taking UPDATE. We have
Win2k3 sp1 64-bit for IA, SQL 2005 EE 64-bit for IA.
Anonymous
August 19, 2006
Hi, Sergey

Could you try enlarging query timeout?
Anonymous
August 20, 2006
Thank's a lot for you answer!
We increased "general timeout" and "connect timeout. SQL server still drops local connection. We can see in server error log next record:
Date 21.08.2006 12:39:20
Log SQL Server (Current - 21.08.2006 12:51:00)

Source spid60

Message
A fatal error occurred while reading the input stream from the network. The session will be terminated.
Anonymous
August 21, 2006
The comment has been removed
Anonymous
September 03, 2006
Hi i am new member of this fourm.I am also geting the following problem,Kindly help me to solve the problem

Problem:

I am developing one web application with vb.net, we have uploaded our pages in online with the sqlserver version 7. But some pages only showing the following error while view the page.But the online sql server also showing the same version.That we tested. Kindly help to solve the problem and aslo let me know how to post new topic.

Error:

An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server)
Anonymous
September 06, 2006
Hi,

Please see the following blog to troubleshoot error 40:

http://blogs.msdn.com/sql_protocols/archive/2005/12/22/506607.aspx

If you still face problem, please go through our questions w/ connectivity issue:

http://blogs.msdn.com/sql_protocols/archive/2006/04/21/581035.aspx

Thanks!
Ming.
Anonymous
September 13, 2006
Hi,

I am trying to establish the Database Mirror with Sql server 2005. I am trying to configuring it with witness. I am getting error while clicking on start mirroring button as follows
"The server network address "%.*ls" can not be reached or does not exist. Check the network address name and reissue the command".
I am trying to use certificate based authentication. Please advice.

Regards,
Chandan
Anonymous
September 13, 2006
j'install actuellement une application et je dois créer une base de donnée à partir d'un script. mais quelle a été ma suprise quand je me suis rendu compte que cette la connexion a SQL 2005 n'arrivait pas à s'etablir: message d'erreur: POUR VOUS CONNECTER A CE SERVEUR VOUS DEVEZ UTILISER SQL Server Management Studio ou SMO. or tenez vous bien j'arrive a me connecter à SQL 2000 avec les même parametre. bon sang SQL 2005 est très...... HELP ME
Anonymous
September 13, 2006
Pouvez-vous nous donner un exemple de la corde de raccordement que vous employez et le message d'erreur exact avec le nombre exact d'erreur ? Il pourrait être possible que le SQL ne soit pas installé pour écouter sur les raccordements à distance. Si c'est un raccordement à distance vous devrez permettre la connectivité à distance en utilisant le magicien de configuration de superficie.

Si vous pouvez me montrer le code ou le script où vous essayez de vous relier je peux pouvoir aider.

C'est un problème avec le SQL ne permettant pas les raccordements à distance ou un problème avec de la votre corde de raccordement. Ceci travaillé avec SQL 2000 ainsi qu'il devrait fonctionner avec 2005 si des raccordements à distance sont permis.

excuses pour mon Français faible

Brad Sarsfield
Microsoft SQL Server
Anonymous
September 17, 2006
An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server)"}

plz help i think this is very common error when we connect .net(2005) fron 2000 sql server database
Anonymous
September 18, 2006
Hi, Firoz

Please refer following blog to troubleshooting your problem:

http://blogs.msdn.com/sql_protocols/archive/2005/12/22/506607.aspx

Good Luck!
Ming.
Anonymous
September 21, 2006
An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server)
Anonymous
October 05, 2006
The comment has been removed
Anonymous
October 16, 2006
Hi Ming, I hope that you can help, having no luck with a 2005 connectivity issue. I've installed SQL2005 on a server already running SQL2K. SQL2K is the default instance, so I'm trying to connect to SQL2005 using MYSERVERSQL2005 as the instance. The steps that I've taken are to apply SP1 and enable remote connections (TCP & Named pipes). I've also made sure the SQL Server Browser service is running and enabled. The error message that I get via SQL2005 client tools is "An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified) (Microsoft SQL Server, Error: -1)" I can connect to Analysis Services, using SERVERNAMESQL2005, if that helps. I dont see anything stange in the error logs, looking under Management->SQL Server Logs. Do you have any ideas? Many thanks Jeremy
Anonymous
October 25, 2006
How to correct sql server 2005 Error No :40
Anonymous
October 29, 2006
Hi, I am unable to connect to my SQL Server Express engine with the SQL Server Management Studio Express, although it works with ODBC. I am working on the very same server. When I connect with WinSQL using ODBC, everything is fine. When I try connecting with Mgmt Studio Express, I get the typical Named Pipes Provider, error 40: ... SQL Server, error 53. This used to work before. I installed a TV tuner and got a MS Video network adapter (whatever it might be). It is disabled now and pinging (it's localhost anyway) works. Telnet shows no reaction. I have a netstat showing the SQL server listening on 0.0.0.0:1433. The firewall log does not show any connect attempt (it is still localhost). The only thing I haven't tried yet is connecting from another computer. Since ODBC does work, my guess is that the Mgmt Studio is giving the trouble, since the service is working. Any hint? Thanks,
Anonymous
November 02, 2006
Please somebody help me,i install sql server 2005 in local machine but no servers name are avaible to me,and when i try to connect to (local),the error shows to me: TITLE: Connect to Database Engine

Cannot connect to sqlserver2005.

ADDITIONAL INFORMATION: An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server) (Microsoft SQL Server, Error: 53) Please someone help me,in configuration manager i dont see any instances....whats wrong?!?!

Anonymous
December 07, 2006
I need help with this error. A transport-level error has occurred when sending the request to the server. (provider: TCP Provider, error: 0 - An existing connection was forcibly closed by the remote host.) I went to Ming's links and did not find help there so I came back here. I read this error is typically indicating problems with the underlying network infrastructure... OK. How ever this is SQL express standing alone on a laptop. I have one dB one SQL one laptop no network involved. Since it has been working fine for 19 months I am thinking system resources of some kind. Performance, memory, size of dB something like that. I have ompletely re-installed everything from the OS on up. I do not really know where to go from here. Any help would be appreciated. Tracy
Anonymous
December 18, 2006
Error: the request failed or the service did not respod in a timely fashion. Consult the event log or other applicable or other applicable error logs for details.
Anonymous
December 20, 2006
The comment has been removed
Anonymous
December 26, 2006
TITLE: Connect to Server

Cannot connect to mssql8.3essentials.com.

ADDITIONAL INFORMATION: An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server) (Microsoft SQL Server, Error: 53) For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&EvtSrc=MSSQLServer&EvtID=53&LinkId=20476

BUTTONS: OK

Anonymous
December 28, 2006
The comment has been removed
Anonymous
January 16, 2007
One thing that I tried to do when I got this error message "An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server)" is increase the timeout duration to 60 instead of 15 seconds. It worked in my case, and I was able to connect to some other SQL Server DB.
Anonymous
January 16, 2007
The comment has been removed
Anonymous
January 17, 2007
I am trying to insert a 450 meg file into a table across a linked server and the insert fails. I am getting the following error message: A fatal error occurred while reading the input stream from the network. The session will be terminated. The insert works fine on files under 250 megs. Also, the file can be inserted when done locally. But across the network on a linked server, it fails. Any ideas?
Anonymous
January 17, 2007
Jeronimo, Error code 2 usually means one of two things: (1) The target server does not have Named Pipes enabled. (2) The server name specified is incorrect. What is the exact SQLCMD command you use (replace any confidential information)? Answer to the checklist from http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=362498&SiteID=1 may help as well.
Anonymous
January 17, 2007
Joel, What client driver/provider you use (MDAC ODBC, OLEDB, SQL Native Client, managed SqlClient, JDBC, ...)? Can this be a time-out error retrieving the data?
Anonymous
January 17, 2007
The comment has been removed
Anonymous
January 17, 2007
The comment has been removed
Anonymous
January 17, 2007
The comment has been removed
Anonymous
January 17, 2007
The comment has been removed
Anonymous
January 18, 2007
The comment has been removed
Anonymous
January 22, 2007
Heard from Microsoft today, Linked servers have a size maximum of 255MB. Meaning you can pass data (in a variable) larger than 255MB over a linked server.
Anonymous
January 22, 2007
The comment has been removed
Anonymous
February 13, 2007
The comment has been removed
Anonymous
February 27, 2007
Hey guys!!! Please help me with this, when i try to import a database made in access to sql server 2005 i get the following error.... TITLE: SQL Server Import and Export Wizard

The SSIS Data Flow Task could not be created. Verify that DTSPipeline.dll is available and registered. The wizard cannot continue and it will terminate.

ADDITIONAL INFORMATION: Value does not fall within the expected range. (Microsoft.SqlServer.DTSRuntimeWrap)

BUTTONS: OK

It worked fine, but i had to uninstal SQL and when i installed again i came across this problem....

Anonymous
February 27, 2007
plz plzzzz... do resolve this issueee .. ive two months for the project and im stuck with this thing for the last 2 weeks at initial stage.
Anonymous
February 28, 2007
I would post this to the sql server SSIS newsgroup, they would be more helpful here -> http://forums.microsoft.com/MSDN/ShowForum.aspx?ForumID=80&SiteID=1
Anonymous
March 06, 2007
We have setup remote peer to peer replication SQL Server 2005 SP2. I have already enabled the

TCP/ IP in both the Server
Browser Service is running
Remote connection is enabled
Added the Server name in the HOST file.
Can ping / Telnet both the server.
Added the DWORD in the resgistry as setup readme for windows 2003 SP1 connection issue. Still I have facing the same issue and not able to replicate the database. Plaese give me a solution. This is an urgent issue. Regards, Minaz Amin

Anonymous
March 06, 2007
I've installed Vista on my laptop and I installed SQL Server 2005. I'm connected to a VPN at the University I attend. I'm trying to connect to the universities server at the SQL Server connection page and I get the following error: Login failed for user ''. The user is not associated with a trusted SQL Server connection. (.Net SqlClient Data Provider). Any ideas on this? Thanks, Kevin
Anonymous
March 07, 2007
Hi Nam and or Ming (or anyone), Did you ever figure out Nam's problem? I'm also getting sporadic connection errors. They seem to happen most often when the workload is a little heavier, but I'd be shocked if it's a worker thread issue. We get the errors from SQL Agent jobs, remote Java batch jobs, and from a third party replication tool (Data Mirror). Thanks, Bill
Anonymous
March 11, 2007
I get the following error: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server) (Microsoft SQL Server, Error: 2 I have set up remote connections and have set up Windows Firewall exceptions (per knowledgebase). I've also named the TCP_All port 1433, and set the server for mixed authentication but the server won't connect. (It did when it was Windows Authentication only, but now it won't connect for me to change it back.) I'm trying to use with Cognos8 on my laptop. The SQL browser connects fine, and the SQL Reporting Services connects fine, but the server itself obstinately refuses. I could really use some help. Thanks, Kelli
Anonymous
March 11, 2007
Go to the server cmd prompt and run: netstat -aon | findstr 1433 Ensure that SQL Server is listening on 1433. You should see something like: TCP 0.0.0.0:1433 0.0.0.0:0 LISTENING 1234 Where 1234 is process ID of SQL Server. Then on server run: telnet localhost 1433 If this connects, press Ctrl+] then type quit to exit telnet. Now do the same telnet remotely, if this fails then your port is still blocked. If it works, then you should be able to connect.
Anonymous
March 11, 2007
so i hear all this talk about changing the default to allow remote servers but HOW ON EARTH DO YOU DO IT!!!!!!!!!!!!!I can't connect to my server at school and it's an online class. PLEASE HELP
Anonymous
March 12, 2007
If you have SQL Server installed you should see an icon called SQL Server Surface Area Configuration. If you don't see the icon look under -> C:Program FilesMicrosoft SQL Server90SharedSAC.EXE Run this executable to launch the program, then click on the link "Surface Area Configuration for Services and Connections". Drill down the tree under your instance name (MSSQLSERVER is the default instance) then Database Engine then Remote Connections and select the options you want here and press OK.
Anonymous
March 14, 2007
Du musst ein Fachmann sein - wirklich guter Aufstellungsort, den du hast!
Anonymous
March 14, 2007
For those of you having the intermittent connection problems, this link may be helpful: http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=620912&SiteID=1. So far, giving the SQL Server service accounts the Windows permission to lock pages in memory has stopped our problems. Even domain accounts with admin rights don't have this permission by default. Of course, rebooting the nodes in our cluster may also be the reason we haven't seen any connection errors today.
Anonymous
March 14, 2007
hiiiiiiiii, when i am connecting the sqlserver in windows application , it not given any error. but when i am connecting the sqlserver in windows application, it given the error, "An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server)". plz help me to solve the problem. Thanks regards MMary
Anonymous
March 27, 2007
Hi I have the error: "TITLE: Connect to Server

Cannot connect to "SQL Server Name".

ADDITIONAL INFORMATION: An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server) (Microsoft SQL Server, Error: 53)

BUTTONS: OK

" I can ping to the machine name and ip ok. Remote connections are allowed on the SQL server instance. I can login locally to the SQL server. sqlcmd -S "sqlservername" -E gives the following error HResult 0x35, Level 16, State 1.... Any ideas how to reslove this

Anonymous
April 12, 2007
TITLE: Connect to Server

Cannot connect to FAHADMASOOD.

ADDITIONAL INFORMATION: An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server) (Microsoft SQL Server, Error: 53) i am recieving this error however i m not connected to any network i m running sql server 2005 on my pc and recieving this error plz kindly tell me how can i resolve this error

Anonymous
April 13, 2007
The comment has been removed
Anonymous
April 13, 2007
First thing I would do is check the SQL Server ERRORLOG. This could be a sign of a corrupted database, try connecting to the server and running dbcc checkdb on the database.
Anonymous
April 21, 2007
Connection::Open failed 0x80004005 We are running a POS application on SQL 2005 and are unable to open the application database. The error we are getting is above. URGENT help
Anonymous
April 23, 2007
I have windows vista, sql server 2005 express, vb express and there is not chance to connect to a database from the database explorer. I have not problem to connect from Management Studio, but whenever i wanted open a connection arise a message telling me that there is need to ask permission to owner or administrator, i have windows authentication and i am the only user (the administrator).
Anonymous
April 23, 2007
Could you post back with the exact error message?
Anonymous
April 27, 2007
Error in SSIS: Error: 0xC0202009 at QR_OrderItem Insert, UPDATE QR_OrderItem [440]: SSIS Error Code DTS_E_OLEDBERROR. An OLE DB error has occurred. Error code: 0x80004005. An OLE DB record is available. Source: "Microsoft SQL Native Client" Hresult: 0x80004005 Description: "Login timeout expired". An OLE DB record is available. Source: "Microsoft SQL Native Client" Hresult: 0x80004005 Description: "An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections.". An OLE DB record is available. Source: "Microsoft SQL Native Client" Hresult: 0x80004005 Description: "TCP Provider: Only one usage of each socket address (protocol/network address/port) is normally permitted.
Anonymous
April 30, 2007
The comment has been removed
Anonymous
May 08, 2007
Hi, I have enabled all the TCP/IP services and also added the sqlserver.exe and sqlbrowser.exe to the firewall and restarted the SQL server. But i am still unable to connect with the remote database. It is still showing error; provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server) (Microsoft SQL Server, Error: 53) I am using SQL server 2005 Express with Windows XP. Please help me out with this problem.
Anonymous
May 30, 2007
That worked. Thank you

re: SQL Server 2005 connectivity error messages

An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server) (Microsoft SQL Server, Error: 2) to correct this error in SQLEXPRESS on servername use [servername]sqlexpress, this should work Monday, February 13, 2006 2:04 PM by Vitgar

Anonymous
June 01, 2007
remove the Port numbers specified in the connection string.
Anonymous
June 02, 2007
Current, I have this problem: An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: TCP Provider, error: 0 - No connection could be made because the target machine actively refused it.) (Microsoft SQL Server, Error: 10061) After I installed SQL 2005 Express in Server 2003, I made firewall and SQL server setting and it works well without any problem from remote site. However, next day morning, when I try to connect it, it gives above error. Current I can connect SQL server in local computer. I can connect web server from remote site without any problems. And I also can use remote desktop access. Any helps is welcomed.
Anonymous
June 05, 2007
The comment has been removed
Anonymous
June 09, 2007
The comment has been removed
Anonymous
June 13, 2007
Finally got to the bottom of this. It suddenly occurred to me that I hadn't looked in the event log, so I had a look and lo and behold: there was an error that suggested that the virtual server's IP address was not unique on the network! Looks like some sort of solaris machine was using the same IP address. I've changed it (impressed how easy it was - just a setting from the cluster administrator) and now all connectivity issues are gone. I suppose the moral of the story is always to check the system logs first!
Anonymous
June 19, 2007
TITLE: Connect to Server

Cannot connect to LITTLEANGLESQLEXPRESS.

ADDITIONAL INFORMATION: An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified) (Microsoft SQL Server, Error: -1) For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&EvtSrc=MSSQLServer&EvtID=-1&LinkId=20476

BUTTONS: OK

Hi. I'm not sure if that message waslisted or not. I keep getting this message and im not sure if im the only one.Th eprogram worked fine for about 2-3 days an this message just started poping i stop connecting.If possible help would be highly apprecited.

Anonymous
June 21, 2007
The comment has been removed
Anonymous
June 21, 2007
login failed for user 'sa' the user is not associated with trusted sql srver connedction: mssql error 18452
Anonymous
July 17, 2007
An error has occured while establishing a connection to the server.When connecting to SQL Server 2005 this failure may be caused by the fact that under the default setting SQL Server does not allow remote connections.(provide:Named Pipes Provider,error:40-Could not open a connection to SQL Server)(Microsoft SQL Server,Error:1326) I got this error when I connect to my SQL server from sql server client express edition which is run on Vista , Help me urgently
Anonymous
July 21, 2007
The comment has been removed
Anonymous
July 30, 2007
The comment has been removed
Anonymous
August 12, 2007
The comment has been removed
Anonymous
August 12, 2007
The comment has been removed
Anonymous
August 26, 2007
Could not locate registry entry for OLE DB provider 'Microsoft.SqlServer'.
Anonymous
September 24, 2007
Seeing how 1and1 doesn't offer remote connection to there SQL2005 is there a string that I can put in my web.config file to get around that?
Anonymous
September 28, 2007
The comment has been removed
Anonymous
September 28, 2007
The comment has been removed
Anonymous
October 11, 2007
I'm trying to set up DotNetNuke with SQL Server 2005 and UltiDev CassiniASP.Net Server, but I keep getting That error 26. I have modified my web.config, added UDP port 1434 to the exceptions list on my firewall, and made sure TCP/IP was enabled. Send me an email if you can help me out... justin057@cox.net
Anonymous
October 11, 2007
Hi, Justin Please check out the following blog: http://blogs.msdn.com/sql_protocols/archive/2007/05/13/sql-network-interfaces-error-26-error-locating-server-instance-specified.aspx Good Luck! Ming.
Anonymous
October 25, 2007
The following error occurs while creating a linked server from sql server2005 .. An exception occurred while executing a Transact-SQL statement or batch.(Microsoft.sqlserver.connectioninfo) Named Pipes provider :Could not open a connection to SQL Server[53]. OLE DB provider "SQLNCLI" for linked server <Linked Server Name> returned message "An error has occurred while establisheing a commention to the server. When connecting to SQL Server 2005,this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections".(Microsoft SQL Server,Error:53)
Anonymous
October 25, 2007
The following error occurs while creating a linked server from sql server2005 .. An exception occurred while executing a Transact-SQL statement or batch.(Microsoft.sqlserver.connectioninfo) Named Pipes provider :Could not open a connection to SQL Server[53]. OLE DB provider "SQLNCLI" for linked server <Linked Server Name> returned message "An error has occurred while establisheing a commention to the server. When connecting to SQL Server 2005,this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections".(Microsoft SQL Server,Error:53)
Anonymous
October 25, 2007
The following error occurs while creating a linked server from sql server2005 .. An exception occurred while executing a Transact-SQL statement or batch.(Microsoft.sqlserver.connectioninfo) Named Pipes provider :Could not open a connection to SQL Server[53]. OLE DB provider "SQLNCLI" for linked server <Linked Server Name> returned message "An error has occurred while establisheing a commention to the server. When connecting to SQL Server 2005,this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections".(Microsoft SQL Server,Error:53) Please send me the solution on bobosinha@yahoo.co.in
Anonymous
November 02, 2007
HI, I am facing following problem : An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified) I am unable to find Protocol for instance in configuration manager and it is also enable in client network. Plzzzzzzzzzzz help, its urgent !!!!!!!!!
Anonymous
November 02, 2007
Start->Run "SQLServerManager.msc" Under +SQL Server 2005 Network Configuration Protocols for INSTANCENAME Enable Named Pipes or TCP/IP then restart the SQL Service net stop mssqlserver net start mssqlserver If it's a named instance (not default) start SQLBrowser net start sqlbrowser Brad Sarsfield
Anonymous
November 13, 2007
Thanx Sir but the problem is that there is no item shown under SQL Server 2005 Network Configuration, no protocol. Plz help me!!!!!!!!11111
Anonymous
November 16, 2007
Hi I am facing the same error with PeopleSoft application with SQL 2005 database. The exact error message that I receive is "[Microsoft][SQL Native Client]TCP Provider: An existing connection was forcibly closed by the remote host. Failed SQL stmt:UPDATE PS_AX_SETUP_WRKPLC SET COUNTER = COUNTER + 1 " The strange thing is that I got the same error message for some other processes and the common thing was increamenting the counter as I am doing in the statement above. Has anyone faced similar problem before? Thank You In Advance Andy.
Anonymous
November 16, 2007
HI, I have installed SQL SERVER 2005 ENT edition and I am facing following problem : An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified) I am unable to find Protocol for instance in configuration manager and it is also enable in client network. Plzzzzzzzzzzz help, its urgent !!!!!!!!!
Anonymous
November 20, 2007
I have been experiencing the error message listed above: A successful TCP connection from SqlClient to the server was broken due to a TCP keep-alive heartbeat failure (typically indicating problems with the underlying network infrastructure) (error: 0): A transport-level error has occurred when receiving results from the server. (provider: TCP Provider, error: 0 - The specified network name is no longer available.) Possibly: A transport-level error has occurred when sending the request to the server. (provider: TCP Provider, error: 0 - An existing connection was forcibly closed by the remote host.) In this Microsoft forum: http://forums.microsoft.com/msdn/showpost.aspx?postid=134053&siteid=1&sb=0&d=1&at=7&ft=11&tf=0&pageid=3 A developer suggests clearing the connection pool associated with the current connection, and or retrying the connection when the (forcibly closed) connection is discovered. In the same forum thread above, notice the similar but different error message caused by SQL Server's defenses against DOS attacks (Error: 10054): ProviderNum: 7, Error: 10054, ErrorMessage: "TCP Provider: An existing connection was forcibly closed by the remote host
Anonymous
January 23, 2008
Hi All, Please help me out in solving the following error Query Engine Error:'01000:[Microsoft][ODBC SQL Server Driver][SQL Server]The statement has been terminated.'
Anonymous
January 29, 2008
Hi I encounterd a rare error,that was 'provider: HTTP Provider, error: 0 - ' with managed SqlClient. Of course,I did not make a HTTP end point. This error occured when SQL Server was doing heavy batch process. SqlClient might have tried to connect the (local)instance with shared memory protocol,but failed. In past,Koterpillar posted about this HTTP provider error,and I entirely agree with him.
Anonymous
February 05, 2008
could not connect to server windows socket error. no connection could be made because the target machine actively refused it.
Anonymous
February 19, 2008
please give some idea about this kind of problems Message="An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server)"
Anonymous
February 20, 2008
See my post in this forum for the solution and the underlying problem we discovered on our server: http://forums.microsoft.com/msdn/showpost.aspx?postid=2879238&siteid=1&mode=1&sb=0&d=1&at=7&ft=11&tf=0&pageid=4
Anonymous
March 14, 2008
An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: TCP Provider, error: 0 - No connection could be made because the target machine actively refused it.) (Microsoft SQL Server, Error: 10061 An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server) (Microsoft SQL Server, Error: 2)
Anonymous
March 14, 2008
The comment has been removed
Anonymous
March 26, 2008
Dear Sir i have this massege during my connection to SQL Server 2005 " Login failed for user ''. The user is not associated with a trusted SQL Server connection" i dont know why? i ahve windows authenitication Mode for user connected to the Database.
Anonymous
March 31, 2008
Ah: Right now I assume you have Windows Authentication enabled. Try instead changing that to Mixed Mode. http://support.microsoft.com/kb/555332 If that doesn't work, you can try instead taking a look at your connection string (look at the blog post). Be very careful about your spaces and semi-colons. Play around with it a little and see if that won't get it to work. HTH - Tres London
Anonymous
April 02, 2008
Anyone offer any advice on some strange behaviour we're seeing? We're getting different behaviour connecting to SQL2005 under .net v1.1 and .net 2 From the SQL error logs 2008-04-02 15:21:00.07 Logon Error: 18456, Severity: 14, State: 5. 2008-04-02 15:21:00.07 Logon Login failed for user 'simsinit'. [CLIENT: 10.128.1.123] 2008-04-02 15:21:23.42 Logon Error: 18456, Severity: 14, State: 5. 2008-04-02 15:21:23.42 Logon Login failed for user 'simsinit'. [CLIENT: <local machine>] When run under a version 1.1 application the IP is used, when run under v2.0 <local machine> is being used and this is causing our application to fail..?? In both instances the connection string is using machinenameinstancename , so why is it reporting differently in the logs?
Anonymous
April 07, 2008
We have ahd a lot of problems with transport errors in a new SQL Server 2005, ASP.NET 2.0 installation on HP hardware and this was our solution http://support.microsoft.com/kb/942861
Anonymous
April 10, 2008
Hello, We are getting this error when using SQL Management Studio and .NET: A transport-level error has occurred when receiving results from the server. (provider: TCP Provider, error: 0 - The specified network name is no longer available.) Thanks for any ideas how to fix it. Tom
Anonymous
April 25, 2008
The comment has been removed
Anonymous
May 02, 2008
Understanding the error message: “Login failed for user ''. The user is not associated with a trusted
Anonymous
May 02, 2008
PingBack from http://names-market.com/2008/05/02/understanding-the-error-message-%e2%80%9clogin-failed-for-user-the-user-is-not-associated-with-a-trusted-sql-server-connection%e2%80%9d/
Anonymous
May 03, 2008
PingBack from http://mike.cheapnewsguide.com/atransportlevelerrorhasoccurredwhensendingtherequesttotheserverprovidernamedpipesprovider.html
Anonymous
May 21, 2008
I have Microsoft SQL Serve, Error: 10061, 1326 and 18452. I found out the problem actually comes from there is an alias exists under SQL Server Configuration Manager=>SQL Native Client Configuration=>Aliases. I deleted the alias. The problem solved.
Anonymous
May 31, 2008
I'm stuck with at 10054 "Forcibly closed" error when I try to connect to a Sql Server 2008 instance on a Windows 2008 Server from Sql Server 2008 Management Studio from a Vista machine. The stuff i've seen seems to think it might be network adapter problem, but I tried it from a nearby machine and they could connnect, but when I put their network card on my machine, it had not fixed the problem. What other than a network adapter issue might cause this problem? I already disabled the DoS entry in the Registy. Stuck.
Anonymous
June 05, 2008
I am trying to setup Database Mirriroring on SQL 2005. Database was setup on the Mirror Server with No recovery . However when I try to start a mirror ,this is the error I receive The server network address 'tcp:/mirror server ;5022'cannot be reached or does not exist .please check to make sure the network port for local and remote endpoints are operational . I have enabled TCPIP /Named pipes on both the parent and mirror server . Both Server are on the same domain and SQl service account are setup as domain admin login . Any ideas
Anonymous
June 06, 2008
Hi, I'm learning SQL on MS SQL Server 2005. I have a C# application on MS Visual Studio which is supposed to retrieve some values from a database and display them. The database and application are both on the same machine. In VS I can see and OPEN the database in the Server Explorer, I can see all tables, values, etc. I'm running MS SQL Server 2005 Express MS C# Visual Studio Express on a Windows XP SP2 machine But when I run the app, I get the Message: An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server) (.Net SqlClient Data Provider) error. TCP/IP and named pipes have both been enabled, to no avail, so I disabled them again. Exceptions for the sqlserver.exe and sqlbrowser.exe were also made in the firewall. Basically I've tried every fix and workaround I could find and it just will not work. It seems ludicrous that I can see and access the db in VS but my app can't. Should I persevere or, given that this seems to be a common and pervasive error with no well-defined solution, just change to a different SQL and stop f"#king about with something that doesn't work. I need to get things done and have already wasted about three days on this basic, basic issue. I suspect that the problem may be my connection string but I can't find anywhere how to correctly define the connection string. Help please!
Anonymous
June 07, 2008
jchecketts, this may address one of your questions: http://www.connectionstrings.com
Anonymous
June 07, 2008
Note that changes to the Surface Area are not reflected without restarting the service. Also, you can't just allow the app, you have to open the ports by number (1433, 1434). Did you pull your connection string from your app or just build one from scratch? If you connect ok in VS, find the connection string and copy it. Note that SQL has a default instance and named instances when you have more than one version running. Make sure you are hitting on the right one. I REALLY appreciate your frustration. I recently wrote a long post to Microsoft about some of these issues and they said "We'll keep these in mind". It is hard to be a one man shop and get anything done.
Anonymous
June 12, 2008
Here is my issue: I am running VPC on a server. I have installed SQL Server 2005 on the VPC. I have changed the port for SQL Server from 1433 to 2633. On my local machine, I can access the SQL Server database on the VPC by logging in with the following server name: VPC-SERVER,2633. However, when I create an alias on my local machine set to the VPC and Port 2633 and try to log in with the alias name, I get the following error: TITLE: Connect to Database Engine

Cannot connect to VPC-ALIAS.

ADDITIONAL INFORMATION: An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server) (Microsoft SQL Server, Error: 53) Any ideas on why I can connect fine when I specify the port in the server name but not when I try to use an alias? (I use aliases to connect to other non-VPC servers without issue.)

Anonymous
June 12, 2008
Never mind my above issue. Somehow it is working now. Maybe I had an extra space at the end of the alias name or something because I changed it, and it worked, then I changed it back, and it worked again.
Anonymous
June 18, 2008
An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact under the default settings SQL Server does not allow remote connections. (provider: Named Pipes Provider, error:40 - Could not open a connection to SQL Server)(Microsoft SQL Server, Error: 53) How can i solve this? Thank you.
Anonymous
June 19, 2008
All, Please HELP ..... Thanks a lot in advance !!! I installed SQL Express 2005 on two new laptops with a default instance, using Windows log in accounts, enable TCP/IP at the end of the installations. One PC is up and running and connect to the remote server without any problem. However, the other one won't connect. when I tested the connection with "sqlcmd -S<SQL Server> -E", I got the following error --- Sqlcmd: Error: Microsoft Native Client : Unable to complete login process due to delay in opening server connection. Please help, if you can. Any help will be greatly appreciated. Thank you all in advance for your time. Best Regards, ccm
Anonymous
June 19, 2008
The messages says, in effect, that "Under the default settings, this program doesn't work." So, you installed an EMU - a bird that doesn't fly. You have to use the Surface Area tool to allow Named Pipes - then restart the service for the changes to take place. WHY every release of Sql Server is shipped with a non-functional installation configuration is an incredible decision from Redmond and a source of a lot of bad taste regarding this product. You also need to check your ports if you are doing remote access. The connection string - build it with a wizard and copy it. Don't try to figure it out on your own. http://woundedego.com
Anonymous
June 30, 2008
Hi all, I have below error happend in my production server that running on Windows 2003 server and SQL Server 2005. Sometime happen and sometime not, may I know what is the caused? Thanks ! Source = .Net SqlClient Data Provider Error = A connection was successfully established with the server, but then an error occurred during the pre-login handshake. (provider: SSL Provider, error: 0 - Not enough storage is available to complete this operation.) | at System.Data.ProviderBase.DbConnectionPool.GetConnection(DbConnection owningObject) at System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection owningConnection) at System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory) at System.Data.SqlClient.SqlConnection.Open()
Anonymous
July 11, 2008
hey guys. please help me with this problem. i got this conection string: String connectionString = @"Data Source=hostnameSQLEXPRESS;Database=pubs;Integrated Security=TRUE"; and after compiling i get this error: Cannot open database "pubs" requested by the login. The login failed. and if i use the string without specifying database(just like that: String connectionString = @"Data Source=hostnameSQLEXPRESS;Integrated Security=TRUE"; ) everything is fine. what should i do to connect to sql server on local machine at last? 1
Anonymous
July 11, 2008
one more question. i've tried to find northwind or pubs database samples but i didn't manage to do so. All i have is folder with Northwind as a SQL Server Compact Edition. are they compatible? so as i understand, i didn't instal MSSQL 2005 properly. where can i find those samples(northwind, pubs) and where i should place them? Thank you for your attention.
Anonymous
July 20, 2008
Just hopping that this will help in the solution of this problem! Server Error in '/' Application.

Anonymous
July 30, 2008
i dont know if its any use but i had the problem relating to the following error message. SSPI handshake failed with error code 0x8009030c while establishing a connection with integrated security; the connection has been closed. anyway it transpired that i had inadvertently started using an old connect string that had "Integrated Security=True" as part of the string. Once i removed this everything worked fine. i hope this helps. <a href='http://www.thewebbureau.com'>web design belfast ireland</a>
Anonymous
August 05, 2008
Well I have been getting this elusive error message for weeks now: An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact under the default settings SQL Server does not allow remote connections. (provider: Named Pipes Provider, error:40 - Could not open a connection to SQL Server) I tried everything suggested here and more, like setting my local connection setting to remote and local connection with TCP/IP and named pipes, adding the sqlserver.exe and sqlbrowser.exe to my firewall exceptions, change my data source from a period to (local), localhost, .SQLEXPRESS, and on and on, none of this helped. I'm working on a Vista Home Premium laptop, with VS 2005 Pro and SQL Server 2005 Express. My solution: I removed all the above changes, put everything back to their default settings and then I changed my connection string in my code to look like the code below, hopefully this will work for you too: public const String ConnectionString = @"Server=<myComputerName>SQLEXPRESS;Integrated Security=SSPI;Initial Catalog=<myDatabaseName>"; Note: This code is for a C# Windows app, the @ sign is important, it allows the backslash to not be treated as an escape character, and Server name needs to be named with your computer name followed by SQLEXPRESS
Anonymous
August 10, 2008
I have run into this problem which I consider a bug pertaining to both Sql Server and VS2008. When I try to set up a connection in Server Explorer of VS2008 to Sql Express or Sql Dev Edition I get a typical error that the remote connection cannot not be established. In fact it is. I double and triple checked everything numerous times. Also in fact I can connect to Sql Server via my C# programs using standard connection strings. It is still a minor issue. The major irritant is that after such an attempt I lose the ability to sign in to Sql Server management Studio. When it first happened last May I thought that I made a major error and it forced me to uninstall Sql Express and replace it with Sql Dev Edition. Last week I tried to set up a connection thru a dbml file with Linq Query Designer. It is supposed set up the connections in Server Explorer in VS2008 on the left. Exactly the same thing happen. Now I cannot get into Sql Management Studio. Not: It never happened with VS2005. Thanks. - Alex
Anonymous
September 08, 2008
TITLE: Connect to Server

Cannot connect to SAHIL.

ADDITIONAL INFORMATION: An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server) (Microsoft SQL Server, Error: 2) For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&EvtSrc=MSSQLServer&EvtID=2&LinkId=20476

BUTTONS: OK

Anonymous
September 12, 2008
While i am scheduling my database back up,I have an error "Error: 18456, Severity: 14, State: 8." and "Error code 3041 for sql server 2005". Back up is not perform. wht is the sollution.
Anonymous
September 18, 2008
Hi, I have installed SQL Server 2005 on a Vista Business. I am able to connect to SQL Server instance on Vista machine from Management Studio on other machine (Running on Xp). But I am not able to connect to Analysis Services default instance on Vista Business machine from Management Studio on other machine (Running on Xp). I did all settings with Vista firewall exceptions, SQL Surface area configuration, Security, everything. Please tell me do I need to modify something else on 'Vista Business'. Thank you.
Anonymous
September 25, 2008
checked lots of things on using command at command promopt SQLCMD -S.SQLEXPRESS getting below msg HResult 0xFFFFFFFF, Level 16, State 1 SQL Network Interfaces: Error Locating Server/Instance Specified [xFFFFFFFF]. Sqlcmd: Error: Microsoft SQL Native Client : An error has occurred while establi shing a connection to the server. When connecting to SQL Server 2005, this failu re may be caused by the fact that under the default settings SQL Server does not allow remote connections.. Sqlcmd: Error: Microsoft SQL Native Client : Login timeout expired. when trying to connet thr' sql server management studio after registering the server which doesnt show green dot . it shows white round means its not statrted and getting error msg An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server) (Microsoft SQL Server, Error: 2) checked the tcp/ip, shared memory and named pipes all are enabled on using osql -E -surekhasvk getting below error [SQL Native Client]Named Pipes Provider: Could not open a connection to SQL Server [2]. [SQL Native Client]Login timeout expired [SQL Native Client]An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. if i install sql 2000 it works fine let me knw how culd i solve the connectivity problem
Anonymous
September 30, 2008
Hi SVK, It looks like your SQL Server instance is not started. Start up services.msc, look for the SQL Server (SQLEXPRESS) service, and start it. If you find that it was already started, verify that you are typing the name of the instance correctly (e.g., is it actually SQLEXPRESS, or is it named something else?). Hope this helps!
Anonymous
October 06, 2008
Login failed for user 'web'. The user is not associated with a trusted SQL Server connection. How to associate this user with with a trusted SQL Server connection (I need script)
Anonymous
October 09, 2008
stand alone windows xp computer + sp2

sql server configuration manager sql server 2005 network configuration protocols for SQLEXPRESS tcp/ip protocals (enabled) ip address (tab) ipall tcp dynamic ports = 2101
sqlexpress service stopped, then restarted successfully (running as 'local system' acct)
in registry, confirmed that port 2101 was being used.
in sql server log, confirmed that port 2101 was being used
no firewalls running on my computer
sqlbrowser service stopped, then restarted successfully (running as 'local system' acct)
running sqlcmd, where i explicitly specify tcp protocol and port number - does work C:>sqlcmd -S tcp:.sqlexpress,2101 -E 1> exit
PROBLEM IS HERE. however running sqlcmd, where i specify tcp protocol and let sqlcmd figure out port to use (via interaction with sqlbrowser) does NOT work! C:>sqlcmd -S tcp:.sqlexpress -E HResult 0xFFFFFFFF, Level 16, State 1 SQL Network Interfaces: Error Locating Server/Instance Specified [xFFFFFFFF]. Sqlcmd: Error: Microsoft SQL Native Client : An error has occurred while establi shing a connection to the server. When connecting to SQL Server 2005, this failu re may be caused by the fact that under the default settings SQL Server does not allow remote connections.. Sqlcmd: Error: Microsoft SQL Native Client : Login timeout expired. UNQUALIFIED ASSESSMENT: it appears to me that either something is wrong with the client connectivity library (im not sure if 'sqlcmd' actually uses 'sqloledb' or 'sqlncli'). or something is wrong with the interaction between the client library and sqlbrowser. i do not know how to troubleshoot further... any help would be GREATLY APPRECIATED

Anonymous
October 17, 2008
Turkish error mesage:"Sunucuyla bağlantı kurulurken hata oluştu. Bu hata, SQL Server 2005'e bağlanılırken, SQL Server'ın uzak bağlantılara izin vermediği varsayılan ayarlar altında oluşan durum nedeniyle oluşabilir. (provider: Adlandırılmış Kanal Sağlayıcısı, error: 40 - SQL Server için bağlantı açılamadı) (.Net SqlClient Data Provider)" i couldnt resolve my problem...
Anonymous
October 20, 2008
The comment has been removed
Anonymous
October 23, 2008
I got the following error while making connection to sql server 2005 : "An error has occured while establishing a connection to the server. when connecting to sqlserver 2005, this failure may be caused by the fact that under default settings SQL server does not allow remote connections. (Provider: Named Pipes Provider, error : 40 - could not open a connection to SQL server )(Microsoft SQL SERVER, ERROR : 2)" Can anyone help me out to fix it ?
Anonymous
October 24, 2008
Not everyone who successfully connects to their SQL server is a SQL genius. By walking through the wizard in Management Studio one can connect pretty easily and then just copy the connection string that is generated. Just know that VS will reformat it and you need to get rid of the added quotation marks.
Anonymous
October 31, 2008
From SQL Server Management Studio I get the following error connecting to a SQL server in a different domain: Login failed for user ''. The user is not associated with a trusted SQL Server connection. (.Net SqlClient Data Provider) On the server Application event log I get: SSPI handshake failed with error code 0x8009030c while establishing a connection with integrated security; the connection has been closed. And on the server System Event Log I get: The kerberos subsystem encountered a PAC verification failure. This indicates that the PAC from the client "insertnamehere" in realm "DomainHere" had a PAC which failed to verify or was modified. Contact your system administrator. I have removed the server from the domain and re-added it. Reinstalled SP2 and still get the error. I am able to connect to other sql servers in the domain without incident - just this one.
Anonymous
November 18, 2008
The Request failed or the service did not respond in a timely fashion. Consult the event log or other applicable error logs for details
Anonymous
November 18, 2008
Hi Guys, This is th error The Request failed or the service did not respond in a timely fashion. Consult the event log or other applicable error logs for details. I got when i am starting the SQL SERVER(MSSQLSERVER) & SQL Server Agent(MSSQLSERVER) from the SQL Server Configuration Manager . Waiting for your Kindly Reply Thanks,
Anonymous
November 20, 2008
I am getting exactly the same error but when I try to start the SSIS from my EM, any ideas are highly appreciated.
Anonymous
November 24, 2008
IS there a possible solution in this error rather than re executing the batch?? Sqlcmd: Error: Microsoft SQL Native Client : Unable to complete login process due to delay in opening server connection.
Anonymous
January 20, 2009
PingBack from http://www.hilpers.com/352351-zugriff-auf-sql-server-2005-a
Anonymous
January 30, 2009
I HAVE WINDOWS VISTA HOME PREMIUM(SP1) i am facing problem during login to sql server. pl do the needful. A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server) (.Net SqlClient Data Provider)

For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&EvtSrc=MSSQLServer&EvtID=53&LinkId=20476

Error Number: 53 Severity: 20 State: 0

Anonymous
February 03, 2009
I am not able to access sql browser it is not showing that in sql server. Does any one suggest me how to connect to sql server. Thanks.
Anonymous
February 05, 2009
Please provide me any help for this error. A transport level error has occured when receiving results from the server. (provider: TCP Provider,error: 0 - The semaphore timeout period has expired. Thanks.
Anonymous
February 10, 2009
Jatin, can you check if this can help you? http://social.msdn.microsoft.com/Forums/en-US/sqldataaccess/thread/d99b4d8e-feeb-43cb-80af-3d4826340a2c/ Thanks
Anonymous
February 26, 2009
Your story was featured in Drigg! Here is the link to vote it up and promote it: http://wordgeist.com/Programming/SQL_Server_2005_connectivity_error_messages
Anonymous
March 06, 2009
Hi, I have Installed SQL Server 2005, when i try to telnet, it fails, OS :- Winxp
Anonymous
March 16, 2009
The comment has been removed
Anonymous
April 02, 2009
I am currently installing windows update, and a perfectly working PC suddely now starts giving the error message below :- Microsoft SQL Server Login: Connection failed: SQLState: '01000' SQL Server Error: 53 [Microsoft][ODBC SQL Server Driver][DBNETLIB]ConnectionOpen(Connect()). Connection failed: SQLState: '08001' SQL Server Error: 17 [Microsoft][ODBC SQL Server Driver][DBNETLIB]SQL Server does not exist or access denied. ...................................................... how can i solve this error?
Anonymous
May 25, 2009
DTS_E_OLEDBERROR. An OLE DB error has occurred. Error code: 0x80004005. An OLE DB record is available. Source: "Microsoft SQL Native Client" Hresult: 0x80004005 Description: "Login timeout expired". An OLE DB record is available. Source: "Microsoft SQL Native Client" Hresult: 0x80004005 Description: "An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections.". An OLE DB record is available. Source: "Microsoft SQL Native Client" Hresult: 0x80004005 Description: "TCP Provider: No such host is known.
Anonymous
July 03, 2009
it will be very nice of u ,if u can fix this problem......
Anonymous
July 03, 2009
An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)
Anonymous
July 04, 2009
Christopher, THANK YOU!!! Christopher Cheng said: For those who gave up, try one more thing: Start "SQL Server Configuration Manager", In "SQL Server 2005 Network Configuration" > "Protocols for SQLEXPRESS", Click on the tab "IP Addresses", Change all TCP Port to 1433. Yes, I mean all, even "IPAll", then it will work!
Anonymous
July 16, 2009
Hi i was also facing the problem when connecting sql server 2005 with sqlconnection then i also got the following error message Sqlcmd: Error: Microsoft SQL Native Client: An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. I referred the following url and solved http://sqlservererror-info.blogspot.com/2009/07/error-has-occurred-while-establishing.html Regards
Anonymous
July 17, 2009
Hi I got the reasons for the following error. This error is comming because you have to enable remote connection for sql server Sqlcmd: Error: Microsoft SQL Native Client: An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. In the following url theire is ways to enable remote connections in sql server http://sqlservererror-info.blogspot.com/2009/07/error-has-occurred-while-establishing.html Regards
Anonymous
July 17, 2009
Try this also http://aspnetmembershipprovider.blogspot.com/2009/02/error-has-occurred-while-establishing.html
Anonymous
July 31, 2009
The comment has been removed
Anonymous
July 31, 2009
The comment has been removed
Anonymous
September 11, 2009
Please make sure the "SQL Server Browser" service is enabled and started. I have seen this service disabled on servers where there is an Error 26, unable to connect.
Anonymous
October 01, 2009
I have a problem ... I'm doing a server of an online game but I am asked as a condition SQLServer 2005 Express magnement ... when I install this and follow all instances that I finally called the game ... I get an error trying to connect to the game program to edit ... says: Error in connection: SQLState: 08001 SQL Server Error: 2 [Microsoft] [SQL Native Client] Named Pipes Provider: I can not open a connection to SQL Server [2]. Error in the connection SQLState: HYT00 SQL Server Error: 0 [Microsoft] [SQL Native Client] has ended the waiting time logon Error in connection: SQLState: 08001 SQL Server Error: 2 [Microsoft] [SQL Native Client] An error while establishing a connection to the server. When connecting to SQL server 2005, the default settings SQL Server does not allow remote connections.
Anonymous
October 15, 2009
Try restarting the SQL server service. go to Windows + R and type services.msc
Anonymous
December 13, 2009
Here are the steps to resolve this error. It worked for me. It is a very nice documented tutorial along with the video. http://techpint.com/programming/error-26-%E2%80%93-error-locating-serverinstance-specified-sql-server
Anonymous
January 02, 2010
Hello, can anybody help please, when I connect from MS access client machine to my SQL server 2005 I get the following error:- Connection failed SQLStatus:'01000' SQL server error:53 [Microsoft][ODBC SQL SERVER Driver][DBNETLIB]Connectionopen(Connect()). Connection faild: SQLStatus:'08001' SQL server error:17 [Microsoft][ODBC SQL SERVER Driver][DBNETLIB]SQL sever doesn't exist or access denied.
Anonymous
January 21, 2010
Thanks, just the number 0x274C, Level 16, State 1 found above has indicated that my server (the company hosting it) has a firewall blocking remote SQL.
Anonymous
January 26, 2010
The comment has been removed
Anonymous
February 02, 2010
Hi ,This is my server problem . please solve this problem. Cannot connect to SHIVA.

Anonymous
February 02, 2010
As I understand this, "Named Pipes" is the default protocol, but is not available by default (and is only relevant to an installation on the same machine). So, either use TCP/IP or use the Surface Area Configuration tool to allow Named Pipes (if your SQL Server is on the same machine as your client).
Anonymous
February 04, 2010
Hi this is Amrita,i m useing sql 2005 in dotnetnuke so its giving an Error of sql The stored procedure 'dbo.UpdateDatabaseVersionAndName' doesn't exist. As a Dotnetnuke solutions they are providing me option to resolve this problem is to use 'db owner'so please can any one guide how i can set the db owner in my sql server management studio express and i am also not able to create new database in sql,it gaves me an ERROR: CREATE DATABASE failed. Some file names listed could not be created. Check related errors. (Microsoft SQL Server, Error: 1807) please help me out Thanks Amrita Vishnoi
Anonymous
February 15, 2010
i have installed sql server 2005 express edition .... but i unable to connect to the server.. i have an error message like.... you could not open a connection.... error code 2 error code 40
Anonymous
February 26, 2010
Hi, I Had a Problem in the sql server login.. connection failed: sql state:'08001' sql server error: 53 [microsoft][sql native client]named pipes provider:could open a connection to sql server[53] connection failed: sql state:'HYT00' SQL Server error: [microsoft][sql native client]login timed out expired. connection failed: sql state:'08001' sql server error: 53 please let me know the answer soon. Thanks in Advance.
Anonymous
February 28, 2010
what does sqlerror message sqm1011 mean???
Anonymous
March 11, 2010
The comment has been removed
Anonymous
March 26, 2010
The comment has been removed
Anonymous
April 03, 2010
Violation of PRIMARY KEY constraint 'PK_Purchase_Ord'. Cannot insert duplicate key in object 'dbo.Purchase_Ord'. The statement has been terminated.
Anonymous
April 27, 2010
i have the error of instance failure while i am connecting to the sql server 05.i need resolution for that.
Anonymous
July 08, 2010
Hello All, I got an similar error that you mentioned above: 2010-07-06 11:16:58.90 Logon Error: 17806, Severity: 20, State: 2. 2010-07-06 11:16:58.90 Logon SSPI handshake failed with error code 0x8009030c while establishing a connection with integrated security; the connection has been closed. [CLIENT: 164.4.57.61] 2010-07-06 11:16:58.90 Logon Error: 18452, Severity: 14, State: 1. 2010-07-06 11:16:58.90 Logon Login failed for user ''. The user is not associated with a trusted SQL Server connection. [CLIENT: 164.4.57.61] But I´m trying to find out the solution in the links provided but this Dosent has the solution, kindly provide an assistance...
Anonymous
September 15, 2010
Arrived at work this morning with panic breaking loose and there was the following message within the event viewer on the sql server machine: Event Type: Error Event Source: MSSQL$SQLEXPRESS Event Category: (4) Event ID: 17827 Date: 15/09/2010 Time: 22:06:11 User: N/A Computer: DATASERV1 Description: There was a failure while attempting to encrypt a password. The connection has been closed. [CLIENT: <local machine>] For more information, see Help and Support Center at go.microsoft.com/.../events.asp. Data: 0000: a3 45 00 00 14 00 00 00 £E...... 0008: 15 00 00 00 44 00 41 00 ....D.A. 0010: 54 00 41 00 53 00 45 00 T.A.S.E. 0018: 52 00 56 00 31 00 5c 00 R.V.1.. 0020: 53 00 51 00 4c 00 45 00 S.Q.L.E. 0028: 58 00 50 00 52 00 45 00 X.P.R.E. 0030: 53 00 53 00 00 00 00 00 S.S..... 0038: 00 00 .. There was a failure while attempting to encrypt a password. The connection has been closed. [CLIENT: <local machine>] It started at a seemingly random time last night? Its a SQLEXPRESS 2005 install. A reboot sorted it but am trying to find out the cause?!?!
Anonymous
December 21, 2010
My solution for login errors: SSPI handshake failed with error code 0x8009030c while establishing a connection with integrated security; the connection has been closed. AND Login failed for user ''. The user is not associated with a trusted SQL Server connection.

Logoff all remote users from that server (i used "tsadmin" for that)
Connect to SQL instance again

Anonymous
February 06, 2011
An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)
Anonymous
June 14, 2011
Yes. It works!!!! Thanks so much, Cheng!! Christopher Cheng 21 Mar 2006 12:54 AM For those who gave up, try one more thing: Start "SQL Server Configuration Manager", In "SQL Server 2005 Network Configuration" > "Protocols for SQLEXPRESS", Click on the tab "IP Addresses", Change all TCP Port to 1433. Yes, I mean all, even "IPAll", then it will work!
Anonymous
July 03, 2011
I just stumbled upon your blog after reading your blog posts wanted to say thanks.i highly appreciate the blogger for doing this effort.
Anonymous
August 16, 2011
My sql server 2005 showing error no 40 during connectinge with server.
Anonymous
September 27, 2011
The comment has been removed
Anonymous
November 11, 2011
when i am trying to install a 3d software sql is not installing its giving following code "Error code : -2068578304(0)" .What would be the reason for this. Please some one help me to resolve this issue.
Anonymous
July 23, 2012
•Remote OLEDB connection using TCP to a server that is blocked by Firewall In this who is the culprit the server in which App is hosted or the one in which DB is hosted.?
Anonymous
September 13, 2015
when I try to connect https://www.tesaritma.com.tr using SQL connection, it gives "connection refused" I am suspecting it may cause from a network failure (slow connection) how do I increase the timeout value?
Anonymous
September 13, 2015
I get the same error with https://www.beltatex.com how do we increase SQL connection timeout?
Anonymous
September 13, 2015
Hello, I am using MS SQL, a transport-level error has occurred when receiving results from the server. How do we adjust the memory limit? https://www.seoprix.com

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SQL Server 2005 connectivity error messages

Comments

Cannot connect to sqlserver2005.

Cannot connect to mssql8.3essentials.com.

BUTTONS: OK

The SSIS Data Flow Task could not be created. Verify that DTSPipeline.dll is available and registered. The wizard cannot continue and it will terminate.

ADDITIONAL INFORMATION: Value does not fall within the expected range. (Microsoft.SqlServer.DTSRuntimeWrap)

BUTTONS: OK

Cannot connect to "SQL Server Name".

BUTTONS: OK

Cannot connect to FAHADMASOOD.

re: SQL Server 2005 connectivity error messages

Cannot connect to LITTLEANGLESQLEXPRESS.

BUTTONS: OK

Cannot connect to VPC-ALIAS.

Cannot connect to SAHIL.

BUTTONS: OK

For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&EvtSrc=MSSQLServer&EvtID=53&LinkId=20476

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