ADO Errors

The ErrorValueEnum constant describes the ADO error values. For a complete listing of these enumerated constants, including values, see Appendix B: ADO Errors. This section will examine some of the more interesting errors and explain some specific situations that can raise them, or solutions to fix the problem. Both the ErrorValueEnum constant and the short positive decimal number are listed.

Number	ErrorValueEnum constant	Description/Possible causes
3000	adErrProviderFailed	Provider failed to perform the requested operation.
3001	adErrInvalidArgument	Arguments are of the wrong type, are out of acceptable range, or are in conflict with one another. This error is often caused by a typographical error in a SQL SELECT statement. For example, a misspelled field name or table name can generate this error. This error can also occur when a field or table named in a SELECT statement does not exist in the data store.
3002	adErrOpeningFile	File could not be opened. A misspelled file name was specified, or a file has been moved, renamed, or deleted. Over a network, the drive might be temporarily unavailable or network traffic might be preventing a connection.
3003	adErrReadFile	File could not be read. The name of the file is specified incorrectly, the file might have been moved or deleted, or the file might have become corrupted.
3004	adErrWriteFile	Write to file failed. You might have closed a file and then tried to write to it, or the file might be corrupted. If the file is located on a network drive, transient network conditions might prevent writing to a network drive.
3021	adErrNoCurrentRecord	Either BOF or EOF is True, or the current record has been deleted. Requested operation requires a current record. An attempt was made to update records by using Find or Seek to move the record pointer to the desired record. If the record is not found, EOF will be True. This error can also occur after a failed AddNew or Delete because there is no current record when these methods fail.
3219	adErrIllegalOperation	Operation is not allowed in this context.
3220	adErrCantChangeProvider	Supplied provider is different from the one already in use.
3246	adErrInTransaction	Connection object cannot be explicitly closed while in a transaction. A Recordset or Connection object that is currently participating in a transaction cannot be closed. Call either RollbackTrans or CommitTrans before closing the object.
3251	adErrFeatureNotAvailable	The object or provider is not capable of performing the requested operation. Some operations depend on a particular provider version.
3265	adErrItemNotFound	Item cannot be found in the collection corresponding to the requested name or ordinal. An incorrect field or table name has been specified.
3367	adErrObjectInCollection	Object is already in collection. Cannot append. An object cannot be added to the same collection twice.
3420	adErrObjectNotSet	Object is no longer valid.
3421	adErrDataConversion	Application uses a value of the wrong type for the current operation. You might have supplied a string to an operation that expects a stream, for example.
3704	adErrObjectClosed	Operation is not allowed when the object is closed. The Connection or Recordset has been closed. For example, some other routine might have closed a global object. You can prevent this error by checking the State property before you attempt an operation.
3705	adErrObjectOpen	Operation is not allowed when the object is open. An object that is open cannot be opened. Fields cannot be appended to an open Recordset.
3706	adErrProviderNotFound	Provider cannot be found. It may not be properly installed. The name of the provider might be incorrectly specified, the specified provider might not be installed on the computer where your code is being executed, or the installation might have become corrupted.
3707	adErrBoundToCommand	The ActiveConnection property of a Recordset object, which has a Command object as its source, cannot be changed. The application attempted to assign a new Connection object to a Recordset that has a Command object as its source.
3708	adErrInvalidParamInfo	Parameter object is improperly defined. Inconsistent or incomplete information was provided.
3709	adErrInvalidConnection	The connection cannot be used to perform this operation. It is either closed or invalid in this context.
3710	adErrNotReentrant	Operation cannot be performed while processing event. An operation cannot be performed within an event handler that causes the event to fire again. For example, navigation methods should not be called from within a WillMove event handler.
3711	adErrStillExecuting	Operation cannot be performed while executing asynchronously.
3712	adErrOperationCancelled	Operation has been canceled by the user. The application has called the CancelUpdate or CancelBatch method and the current operation has been canceled.
3713	adErrStillConnecting	Operation cannot be performed while connecting asynchronously.
3714	adErrInvalidTransaction	Coordinating transaction is invalid or has not started.
3715	adErrNotExecuting	Operation cannot be performed while not executing.
3716	adErrUnsafeOperation	Safety settings on this computer prohibit accessing a data source on another domain.
3717	adWrnSecurityDialog	For internal use only. Don't use. (Entry was included for the sake of completeness. This error should not appear in your code.)
3718	adWrnSecurityDialogHeader	For internal use only. Don't use. (Entry included for the sake of completeness. This error should not appear in your code.)
3719	adErrIntegrityViolation	Data value conflicts with the integrity constraints of the field. A new value for a Field would cause a duplicate key. A value that forms one side of a relationship between two records might not be updatable.
3720	adErrPermissionDenied	Insufficient permission prevents writing to the field. The user named in the connection string does not have the proper permissions to write to a Field.
3721	adErrDataOverflow	Data value is too large to be represented by the field data type. A numeric value that is too large for the intended field was assigned. For example, a long integer value was assigned to a short integer field.
3722	adErrSchemaViolation	Data value conflicts with the data type or constraints of the field. The data store has validation constraints that differ from the Field value.
3723	adErrSignMismatch	Conversion failed because the data value was signed and the field data type used by the provider was unsigned.
3724	adErrCantConvertvalue	Data value cannot be converted for reasons other than sign mismatch or data overflow. For example, conversion would have truncated data.
3725	adErrCantCreate	Data value cannot be set or retrieved because the field data type was unknown, or the provider had insufficient resources to perform the operation.
3726	adErrColumnNotOnThisRow	Record does not contain this field. An incorrect field name was specified or a field not in the Fields collection of the current record was referenced.
3727	adErrURLDoesNotExist	Either the source URL or the parent of the destination URL does not exist. There is a typographical error in either the source or destination URL. You might have https://mysite/photo/myphoto.jpg when you should actually have https://mysite/photos/myphoto.jpg instead. The typographical error in the parent URL (in this case, photo instead of photos) has caused the error.
3728	adErrTreePermissionDenied	Permissions are insufficient to access tree or subtree. The user named in the connection string does not have the appropriate permissions.
3729	adErrInvalidURL	URL contains invalid characters. Make sure the URL is typed correctly. The URL follows the scheme registered to the current provider (for example, Internet Publishing Provider is registered for http).
3730	adErrResourceLocked	Object represented by the specified URL is locked by one or more other processes. Wait until the process has finished and attempt the operation again. The object you are trying to access has been locked by another user or by another process in your application. This is most likely to arise in a multi-user environment.
3731	adErrResourceExists	Copy operation cannot be performed. Object named by destination URL already exists. Specify adCopyOverwrite to replace the object. If you do not specify adCopyOverwrite when copying the files in a directory, the copy fails when you try to copy an item that already exists in the destination location.
3732	adErrCannotComplete	The server cannot complete the operation. This might be because the server is busy with other operations or it might be low on resources.
3733	adErrVolumeNotFound	Provider cannot locate the storage device indicated by the URL. Make sure the URL is typed correctly. The URL of the storage device might be incorrect, but this error can occur for other reasons. The device might be offline or a large volume of network traffic might prevent the connection from being made.
3734	adErrOutOfSpace	Operation cannot be performed. Provider cannot obtain enough storage space. There might not be enough RAM or hard-drive space for temporary files on the server.
3735	adErrResourceOutOfScope	Source or destination URL is outside the scope of the current record.
3736	adErrUnavailable	Operation failed to complete and the status is unavailable. The field may be unavailable or the operation was not attempted. Another user might have changed or deleted the field you are trying to access.
3737	adErrURLNamedRowDoesNotExist	Record named by this URL does not exist. While attempting to open a file using a Record object, either the file name or the path to the file was misspelled.
3738	adErrDelResOutOfScope	The URL of the object to be deleted is outside the scope of the current record.
3747	adErrCatalogNotSet	Operation requires a valid ParentCatalog.
3748	adErrCantChangeConnection	Connection was denied. The new connection you requested has different characteristics than the one already in use.
3749	adErrFieldsUpdateFailed	Fields update failed. For further information, examine the Status property of individual field objects. This error can occur in two situations: when changing a Field object's value in the process of changing or adding a record to the database; and when changing the properties of the Field object itself. The Record or Recordset update failed due to a problem with one of the fields in the current record. Enumerate the Fields collection and check the Status property of each field to determine the cause of the problem.
3750	adErrDenyNotSupported	Provider does not support sharing restrictions. An attempt was made to restrict file sharing and your provider does not support the concept.
3751	adErrDenyTypeNotSupported	Provider does not support the requested kind of sharing restriction. An attempt was made to establish a particular type of file-sharing restriction that is not supported by your provider. See the provider's documentation to determine what file-sharing restrictions are supported.