Created Issue: sometimes produces error : Exit Code 100. Nothing Succeeded: Unable to determine the workspace. [11709]

Hi.

Thank you for MSBuild Extension Pack 4.0.6.0 (October 2012).

I've run into this error twice already and I'm wondering how I can provide more diagnostic information because it only happens sometimes (randomly).

<TfsSource Version="2010" TaskAction="Checkout" ItemPath=".\Solution1\Project1\Properties\AssemblyInfo.cs" WorkingDirectory="$(MSBuildProjectDirectory)" />

From the TFS 2010 diagnostic build log:

Using "TfsSource" task from assembly "C:\Builds\9\Sources\Third Party\Microsoft\MsBuild Extension Pack\October 2012\MSBuild Extension Pack 4.0.6.0 Binaries\MSBuild.ExtensionPack.dll".
Task "TfsSource" (TaskId:5637)
Resolve TF.exe path (TaskId:5637)
TF.exe path resolved to: c:\Program Files (x86)\Microsoft Visual Studio 10.0\Common7\Tools\..\IDE\tf.exe (TaskId:5637)
TF Operation: Checkout (TaskId:5637)
Executing c:\Program Files (x86)\Microsoft Visual Studio 10.0\Common7\Tools\..\IDE\tf.exe checkout ".\Solution1\Project1\Properties\AssemblyInfo.cs" /noprompt /recursive (TaskId:5637)
(TaskId:5637)
C:\Builds\9\Sources\build.proj(1108,5): error : Exit Code 100. Nothing Succeeded: Unable to determine the workspace. You may be able to correct this by running 'tf workspaces /collection:TeamProjectCollectionUrl'.
Done executing task "TfsSource" -- FAILED. (TaskId:5637)

The build definition uses DefaultTemplate.xml and doesn't do anything special with the workspace.

Re-running the build will resolve the issue.

Thank you.