I get this error (as below) from times to times and I don't know what is the cause of it. 
Can you please have a look at it and advise? Thank You.

 ComputerName: 
  IdentityName: 
  LocalItem: 
  Message: Warning: There are other pending changes against the item.
  ResourceName: 
  ServerItem: $/Ci2/TestStudio/Platform/CoreLib/Enquiry Pattern/US27869_Contextual_Keys.tstest
  ItemId: 625721
  WorkspaceName: 
  WorkspaceOwner: 

[03/19 08:16:26,Telerik.TestStudio.exe(3076:1),TeamFoundationServer] TFSServer.Checkout() : Error pending edits
[03/19 08:16:26,Telerik.TestStudio.exe(3076:1),TeamFoundationServer] TFSServer.Checkout() : ------- Function End -------
[03/19 08:16:26,Telerik.TestStudio.exe(3076:1),ProjectModel] StandaloneHost.EditControlledFiles() : Checked out files from source control
[03/19 08:16:26,Telerik.TestStudio.exe(3076:1),ProjectModel] StandaloneHost.EditControlledFiles() : ------- Function End -------
[03/19 08:16:31,Telerik.TestStudio.exe(3076:1),Uncategorized] Orchestrator._iUIProject_TestSelected() : Test 'US27869_Contextual_Keys' selected.
[03/19 08:16:31,Telerik.TestStudio.exe(3076:18)] First trace message from background unnamed thread (managed ID = 18, native ID = 6940).
[03/19 08:16:31,Telerik.TestStudio.exe(3076:18),TestStudio] CodeService.RegenerateElementsCode() : EXCEPTION! (see below)
     Outer Exception Type: System.Threading.ThreadAbortException
     Message: Thread was being aborted.
     HRESULT: 0x80131530 (Official ID (if app.) = COR_E_THREADABORTED, Error Bit = FAILED, Facility = FACILITY_URT, Code = 5424)
     Call Stack:
          at System.RuntimeType.GetFieldCandidates(String name, BindingFlags bindingAttr, Boolean allowPrefixLookup)
          at System.RuntimeType.GetFields(BindingFlags bindingAttr)
          at System.Type.GetFields()
          at ActiproSoftware.SyntaxEditor.Addons.VB.VBTokenID.GetTokenKey(Int32 id)
          at z.a(ITextBufferReader A_0, Char A_1, Boolean A_2, Boolean& A_3)
          at z.a(ITextBufferReader A_0, ILexicalState A_1, ITokenLexicalParseData& A_2)
          at ActiproSoftware.SyntaxEditor.MergableLexicalParserManager.GetNextToken()
          at l.d()
          at ActiproSoftware.SyntaxEditor.ParserGenerator.RecursiveDescentLexicalParser.GetLookAheadToken(Int32 count)
          at ActiproSoftware.SyntaxEditor.ParserGenerator.RecursiveDescentSemanticParser.GetLookAheadToken(Int32 count)
          at i.c()
          at i.e()
          at i.b(Statement& A_0)
          at i.b(TypeDeclaration A_0, Int32 A_1, AstNodeList A_2, Modifiers A_3)
          at i.g(Int32 A_0, AstNodeList A_1, Modifiers A_2)
          at i.f(Int32 A_0, AstNodeList A_1, Modifiers A_2)
          at i.b(TypeDeclaration A_0, Int32 A_1, AstNodeList A_2, Modifiers A_3)
          at i.g(Int32 A_0, AstNodeList A_1, Modifiers A_2)
          at i.f(Int32 A_0, AstNodeList A_1, Modifiers A_2)
          at i.b(Int32 A_0, AstNodeList A_1, Modifiers A_2)
          at i.aa()
          at i.y()
          at i.k()
          at ActiproSoftware.SyntaxEditor.Addons.VB.VBSyntaxLanguage.PerformSemanticParse(MergableLexicalParserManager manager)
          at ActiproSoftware.SyntaxEditor.MergableLexicalParserManager.PerformSemanticParse(MergableSyntaxLanguage rootLanguage, ITextBufferReader reader, String sourceKey)
          at ActiproSoftware.SyntaxEditor.Addons.DotNet.Dom.DotNetSyntaxLanguage.ActiproSoftware.SyntaxEditor.ISemanticParserServiceProcessor.Process(SemanticParserServiceRequest request)
          at ActiproSoftware.SyntaxEditor.SemanticParserService.a(SemanticParserServiceRequest A_0)
          at ActiproSoftware.SyntaxEditor.SemanticParserService.b(SemanticParserServiceRequest A_0)
          at ActiproSoftware.SyntaxEditor.SemanticParserService.Parse(SemanticParserServiceRequest request)
          at ActiproSoftware.SyntaxEditor.Addons.DotNet.Dom.SourceProjectContent.LoadForCode(ISemanticParserServiceProcessor language, String sourceKey, String code)
          at ArtOfTest.WebAii.Design.CodeGeneration.CodeService.RegenerateElementsCode(Object sender, GenericEventArgs`1 e)