Silverlight Plug-in Error Messages

This topic lists the error messages that come from the native code implementation of the Silverlight plug-in, and the native code level of the object tree and the XAML parser. The error messages are mainly relevant if you use the JavaScript API technique for error handling (OnError) or for general script-level debugging during development.

Note   Handling errors for the JavaScript API is described in the topic Error Handling.

The error messages might not be relevant to managed user code exception handling with the UnhandledException event. However, in many cases, native errors can occur when you make managed calls to members that use functionality in the core. The native errors might be useful debugging clues during the development phase to determine what aspect of the managed call is not working as expected.

The following table lists the error codes and corresponding error messages. The error messages are displayed only when you have the Silverlight developer runtime installed. For more information, see Silverlight Tools. The end-user runtime provides error codes only, but you can use the following table to look up the corresponding error message.

In many cases, the error message will provide sufficient information for you to diagnose and resolve the error. However, some errors are rare and do not provide an explanatory error message. Additionally, some errors can occur in a wide variety of situations, or due to unforeseen conditions. This makes it difficult to provide general-purpose troubleshooting documentation for plug-in errors.

If you encounter an error that you cannot resolve using the information in the following table, you can find additional help on the Silverlight forums by searching for the error code. If you do not find an existing post that describes your situation, create a new post that includes the error code and describes your scenario. These forums are regularly monitored by the Silverlight product team and developer community, and provide the best way to troubleshoot specific error conditions. 

Error Code	Error Message
1001	AG_E_UNKNOWN_ERROR
2000	Document is not well-formed XAML.
2001	DTDs are not allowed.
2002	Entity references to named entities other than lt, gt, amp, apos, and quot are not allowed.
2003	Entity definitions are not allowed.
2004	Only UTF-8 and UTF-16 encodings are supported.
2005	Unknown namespace %0.
2007	Unknown element: %0.
2008	Cannot specify the value multiple times for properties.
2009	Cannot specify content for %0 and set its %1 property at the same time.
2010	%0 does not support %1 as content.
2011	%0 does not support text content.
2012	Unknown attribute %0 on element %1.
2013	Attribute %0 value is out of range.
2014	The attribute %0 is read only and cannot be set.
2015	Cannot declare custom namespaces in JavaScript.
2016	Cannot specify both Name and x:Name attributes.
2017	Null is not a legal value for attribute %0.
2018	The element %0 does not support attributes.
2019	Xaml may not use base type names, use %0 instead.
2020	Invalid Property: %0.
2021	Invalid enum value.
2022	Unknown Color: %0.
2023	%0 is not an event.
2024	Invalid attribute value %0 for property %1.
2025	AG_E_PARSER_ATTRIBUTE
2027	AG_E_PARSER_ELEMENT
2028	The name already exists in the tree: %0.
2030	Property element %0 cannot be used inside another property element.
2031	The property element %0 must appear before other content.
2033	Cannot specify the value multiple times for property: %0.
2034	Elements in a ResourceDictionary must have x:Key or x:Name attribute.
2035	The element is not valid in the given namespace.
2036	XamlReader.Load() does not accept event handlers.
2100	AG_E_INIT_CALLBACK
2101	Failed to initialize the application's root visual
2102	Invalid source file specified on Silverlight plug-in. Expected Uri for application file
2103	Invalid or malformed application: Check manifest
2104	Could not download the Silverlight application. Check web server settings
2105	Failed to load pre-requisites for the application
2106	Failed to load the application. It was built with an obsolete version of Silverlight
2107	Splash screen file needs to be on the same domain as the application
2108	Failed to download the splash screen
2150	Failed to load a platform extension. Possibly corrupt or non-existent file: %0
2152	Failed to download a platform extension: %0
2153	Failed to load a platform extension. Possibly corrupt or invalid file: %0
2201	AG_E_RUNTIME_INVALID_CALL
2202	AG_E_RUNTIME_FINDNAME
2203	AG_E_RUNTIME_SETVALUE
2204	AG_E_RUNTIME_GETVALUE
2205	AG_E_RUNTIME_ADDEVENT
2206	AG_E_RUNTIME_DELEVENT
2207	AG_E_RUNTIME_METHOD
2208	AG_E_RUNTIME_GETHOST
2209	AG_E_RUNTIME_GETPARENT
2210	AG_E_INVALID_ARGUMENT
2211	AG_E_RUNTIME_HTML_ACCESS_RESTRICTED
2212	Animation target not specified.
2213	Cannot resolve TargetName %0.
2214	Cannot resolve TargetProperty %0 on specified object.
2215	%0 cannot be used to animate property %1 due to incompatible type.
2216	Multiple animations in the same containing Storyboard cannot target the same property on a single element.
2217	KeyTime property on KeyFrame object must be set to a non-negative TimeSpan value.
2218	Operation is not valid on an active Animation or Storyboard. Root Storyboard must be stopped first.
2219	Operation is not allowed on a non-root Storyboard.
2220	Cannot determine Storyboard Duration.
2221	Shader file %0 not found.
2222	Invalid shader.
2250	AG_E_RUNTIME_MANAGED_UNKNOWN_ERROR
2251	AG_E_RUNTIME_MANAGED_ACTIVATION
2252	AG_E_RUNTIME_MANAGED_ASSEMBLY_DOWNLOAD
2253	AG_E_RUNTIME_MANAGED_ASSEMBLY_LOAD
2254	AG_E_PARSER_UNKNOWN_TYPE
2255	AG_E_PARSER_BAD_TYPE
2256	AG_E_PARSER_BAD_NATIVE_TYPE
2257	AG_E_PARSER_CREATE_OBJECT_FAILED
2258	AG_E_PARSER_PROPERTY_NOT_FOUND
2259	AG_E_PARSER_BAD_PROPERTY_TYPE
2260	AG_E_PARSER_BAD_PROPERTY_VALUE
2261	AG_E_PARSER_ROOT_NOT_CUSTOM
2262	AG_E_PARSER_NAMESPACE_NOT_SUPPORTED
2263	AG_E_PARSER_MISSING_DEFAULT_NAMESPACE
2264	AG_E_PARSER_INVALID_XMLNS
2265	AG_E_PARSER_INVALID_CLASS
2266	AG_E_RUNTIME_MANAGED_BAD_DLR_SCRIPT
2267	AG_E_PARSER_INVALID_XCODE_TAG
2268	AG_E_PARSER_ELEMENT_IGNORED
2269	Elements in a ResourceDictionary must not set both x:Name and x:Key, or x:Key twice
2270	Attribute x:Key set on an invalid object, only objects in a ResourceDictionary can have x:Key
2271	Improper syntax for Static Resource (ie: {StaticResource Key})
2272	Cannot find a Resource with the Name/Key %0
2273	Elements in the same ResourceDictionary cannot have the same x:Key
2274	AG_E_RUNTIME_MANAGED_ASSEMBLY_NOT_FOUND
2275	Invalid characters in Source Uri.
3000	AG_E_UNABLE_TO_PLAY
3001	AG_E_INVALID_FILE_FORMAT
3002	AG_E_NOT_FOUND
3003	AG_E_MEDIA_DISCONNECTED
3004	Invalid ASX element
3005	Invalid ASX attribute
3006	Unsupported ASX element
3007	Unsupported ASX attribute
3008	ASX parse error
4000	AG_E_ABORT_FAILED
4001	AG_E_NETWORK_ERROR
4002	AG_E_ACCESS_DENIED
4003	AG_E_INVALID_POLICY
4004	AG_E_MANAGED_EXCEPTION
4005	XamlReader.Load() does not support x:Class.
4006	Only the root element can have an x:Class attribute.
4007	The root element must be <UserControl>, not a subclass of UserControl.
4008	Layout cycle detected. Layout could not complete.
4009	Element is already the child of another element.
4010	The ItemsControl.ItemsPanelTemplate must have a derivative of Panel as the root element.
4011	Setting the Template property on a UserControl is not supported.
4012	Cannot explicitly modify Children collection of Panel used as ItemsPanel for ItemsControl. ItemsControl generates child elements for Panel.
4013	Cycle detected in merged resource dictionaries
4014	Local values are not allowed in resource dictionary with Source set
4015	This Style's hierarchy of BasedOn references contains a loop.
4016	Can only base on a Style with target type that is base type of this style's target type.
4017	A Style cannot be based on itself.
4018	After a Style is in use (sealed), it cannot be modified.
4019	Must have non-null value for TargetType.
4020	'%0' is not a valid value for property '%1'.
4021	Using NavigationState requires a hidden <iframe id='_sl_historyFrame'> element in HTML.
4022	Mouse promotion can only be suspended on a primary TouchPoint’s down action.
4023	Navigation is prohibited for this Silverlight application.
6000	Unable to play protected content
6001	Unable to individualize due to a network or protocol error
6002	Unable to acquire license due to a network or protocol error
6003	Unable to individualize due to an installation failure
6004	Update of Silverlight required
6005	Incorrect header format for protected media file
6006	Unable to process license
6007	Unable to acquire license due to an application specific error
6008	Individualization disabled by user
7000	unexpected end of input
7001	unrecognized encoding
7002	unable to switch the encoding
7003	unrecognized input signature
7004	whitespace expected
7005	semicolon expected
7006	'>' expected
7007	quote expected
7008	equal expected
7009	wfc: no '<' in attribute value
7010	hexadecimal digit expected
7011	decimal digit expected
7012	'[' expected
7013	'(' expected
7014	illegal xml character
7015	illegal name character
7016	incorrect document syntax
7017	incorrect CDATA section syntax
7018	incorrect comment syntax
7019	incorrect conditional section syntax
7020	incorrect ATTLIST declaration syntax
7021	incorrect DOCTYPE declaration syntax
7022	incorrect ELEMENT declaration syntax
7023	incorrect ENTITY declaration syntax
7024	incorrect NOTATION declaration syntax
7025	NDATA expected
7026	PUBLIC expected
7027	SYSTEM expected
7028	name expected
7029	one root element
7030	wfc: element type match
7031	wfc: unique attribute spec
7032	text/xmldecl not at the beginning of input
7033	leading \'xml\'
7034	incorrect text declaration syntax
7035	incorrect xml declaration syntax
7036	incorrect encoding name syntax
7037	incorrect public identifier syntax
7038	wfc: pes in internal subset
7039	wfc: pes between declarations
7040	wfc: no recursion
7041	entity content not well formed
7042	wfc: undeclared entity
7043	wfc: parsed entity
7044	wfc: no external entity references
7045	incorrect processing instruction syntax
7046	incorrect system identifier syntax
7047	'?' expected
7048	no ']]>' in element content
7049	not all chunks of value have been read
7050	DTD was found but is prohibited
7051	illegal qualified name character
7052	multiple colons in qualified name
7053	colon in name
7054	declared prefix
7055	undeclared prefix
7056	non default namespace with empty uri
7057	'xml' prefix is reserved and must have the https://www.w3.org/XML/1998/namespace URI
7058	'xmlns' prefix is reserved for use by XML
7059	xml namespace URI (https://www.w3.org/XML/1998/namespace) must be assigned only to prefix 'xml'
7060	xmlns namespace URI (https://www.w3.org/2000/xmlns/) is reserved and must not be used
7061	invalid decimal
7062	invalid hexidecimal
7063	invalid unicode
7064	invalid encoding
8001	Upgrade required
8002	Browser restart required