Microsoft.Build.Utilities.FileTracker threw an exception error. Happens with different projects

Question

Lately with Visual Studio 2010 Ultimate, C#, in Win7 64bit, I get the error below when I compile any project. The workaround is to add false<

Answer 1

Old question but I hope it will help someone who googles it. Its not exactly the Nullref in the original question which was caused by the bug tracked by Microsoft but I want to share it.

I had serious problems building C++ projects which I tracked down to be caused by the Temp environment variables (propably containing spaces in the path names).

Unerwarteter Fehler bei der CL-Aufgabe.
System.TypeInitializationException: Der Typeninitialisierer für "Microsoft.Build.Utilities.FileTracker" hat eine Ausnahme verursacht. ---> System.IO.FileNotFoundException: Das System kann die angegebene Datei nicht finden. (Ausnahme von HRESULT: 0x80070002)
   bei System.Runtime.InteropServices.Marshal.ThrowExceptionForHRInternal(Int32 errorCode, IntPtr errorInfo)
   bei System.Runtime.InteropServices.Marshal.ThrowExceptionForHR(Int32 errorCode)
   bei Microsoft.Build.Shared.NativeMethodsShared.ThrowExceptionForErrorCode(Int32 errorCode)
   bei Microsoft.Build.Shared.NativeMethodsShared.GetLongFilePath(String path)
   bei Microsoft.Build.Utilities.FileTracker..cctor()
   --- Ende der internen Ausnahmestapelüberwachung ---
   bei Microsoft.Build.CPPTasks.CL.ComputeOutOfDateSources()
   bei Microsoft.Build.CPPTasks.TrackedVCToolTask.SkipTaskExecution()
   bei Microsoft.Build.Utilities.ToolTask.Execute()
   bei Microsoft.Build.CPPTasks.TrackedVCToolTask.Execute()
   bei Microsoft.Build.BackEnd.TaskExecutionHost.Microsoft.Build.BackEnd.ITaskExecutionHost.Execute()
   bei Microsoft.Build.BackEnd.TaskBuilder.d__20.MoveNext()

Changing TEMP and TMP to:

%USERPROFILE%\Appdata\Local\Temp

solved it.