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

I found the solution for my environment by reflecting Windows\Microsoft.NET\Framework\v4.0.30319\Microsoft.Build.Utilities.v4.0.dll

My TEMP/TMP environment variable was pointing to a ram drive root folder (T:\) without any further directory nesting! The line s_tempPath = Path.GetDirectoryName(Path.GetTempPath()); in the static ctor of Microsoft.Build.Utilities.FileTracker resulted in null, which caused the exception as mentioned by you.

Now my TEMP/TMP environment variable is pointing to T:\TEMP and everything is working fine.