Try this ( from MSFT support )
Can you check if the dll is in the global assembly cache (open a VS 2010 command prompt
(Start | All Programs | Microsoft Visual Studio 10.0 | Visual Studio Tools))
Type in
Gacutil –l > list.txt
Notepad list.txt
Do you see an entry like
Microsoft.VisualStudio.QualityTools.TestCaseManagement, Version=10.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL
If so, from the same command prompt, run fuslogvw, go to settings, select log bind failures to disk, select ok
Run your command line
C:\Program Files\Microsoft Visual Studio 10.0\Common7\IDE\devenv.com /Build "Release|Mixed Platforms" "D:\Builds\19\Test VizXView\VizXView v1.8 Test Release Build - Weekly\Sources\VizXView v1.8\VizXView 1.8.sln"
Click on the refresh button in fuslogvw. Do we get any bind errors?