TFS Build Fails

We run TFS 2008 and Visual Studio 2010B2 (as with any Beta, errors are predominant).

Below are the errors given (from the build log):

Task "DeleteWorkspaceTask" 
DeleteWorkspaceTask 
TeamFo开发者_开发知识库undationServerUrl="http://dev-svr:8080/" 
BuildUri="vstfs:///Build/Build/1679" 
Name="**ALICE_3_**" 
DeleteLocalItems=True 
TF14061: The workspace **ALICE_3_**;HELLO\TFSservice does not exist. 
Done executing task "DeleteWorkspaceTask". 

Task "DeleteWorkspaceTask" skipped, due to false condition; 
( '$(SkipInitializeWorkspace)'!='true' and ('$(CleanCompilationOutputOnly)' == 'true' or '$(SkipClean)' == 'true') ) 
was evaluated as ( 'false'!='true' and ('false' == 'true' or 'false' == 'true') ). 

Using "CreateWorkspaceTask" task from assembly 
"C:\Program Files\Microsoft Visual Studio 9.0\Common7\IDE\PrivateAssemblies\Microsoft.TeamFoundation.Build.Tasks.VersionControl.dll". 
Task "CreateWorkspaceTask" 
CreateWorkspaceTask 
TeamFoundationServerUrl="http://dev-svr:8080/" 
BuildUri="vstfs:///Build/Build/1679" 
Name="**ALICE_3_**" 
BuildDirectory="c:\builds\science\SCIENCE\AB" 
SourcesDirectory="c:\builds\science\SCIENCE\AB\Sources" 
Comment="Workspace created by Team Build" 

C:\Program Files\MSBuild\Microsoft\VisualStudio\TeamBuild\Microsoft.TeamFoundation.Build.targets(796,5,796,5): 
error : The path c:\builds\science\SCIENCE\AB\Sources is already mapped in workspace **ALICE_3**. 
[c:\builds\science\SCIENCE\AB\BuildType\TFSBuild.proj]

Any input would be appreciated, as this area of development isn't my forte.

Regards, Matt

From this Stack Overflow question:

Use the command line utility tf.

You can get a list of all workspaces by bringing up a Visual Studio Command Prompt and using the following command:

c:\>tf workspaces /owner:*

You should see your problem workspace in the list as well as it's owner.

You can delete the workspace with the following command:

C:\>tf workspace /delete /server:BUILDSERVER WORKSPACENAME;OWNERNAME

After looking into in greater depth it looks as if the problem lies elsewhere:

Task "DeleteWorkspaceTask"
  DeleteWorkspaceTask TeamFoundationServerUrl="http://dev-svr:8080/" BuildUri="vstfs:///Build/Build/1679" Name="**ALICE_3_**" DeleteLocalItems=True
  TF14061: The workspace **ALICE_3_**;HELLO\TFSservice does not exist.
Done executing task "DeleteWorkspaceTask".
Task "DeleteWorkspaceTask" skipped, due to false condition; ( '$(SkipInitializeWorkspace)'!='true' and ('$(CleanCompilationOutputOnly)' == 'true' or '$(SkipClean)' == 'true') ) was evaluated as ( 'false'!='true' and ('false' == 'true' or 'false' == 'true') ).
Using "CreateWorkspaceTask" task from assembly "C:\Program Files\Microsoft Visual Studio 9.0\Common7\IDE\PrivateAssemblies\Microsoft.TeamFoundation.Build.Tasks.VersionControl.dll".
Task "CreateWorkspaceTask"
  CreateWorkspaceTask TeamFoundationServerUrl="http://dev-svr:8080/" BuildUri="vstfs:///Build/Build/1679" Name="**ALICE_3_**" BuildDirectory="c:\builds\science\SCIENCE\AB" SourcesDirectory="c:\builds\science\SCIENCE\AB\Sources" Comment="Workspace created by Team Build"
C:\Program Files\MSBuild\Microsoft\VisualStudio\TeamBuild\Microsoft.TeamFoundation.Build.targets(796,5,796,5): error : The path c:\builds\science\SCIENCE\AB\Sources is a

lready mapped in workspace ALICE_3. [c:\builds\science\SCIENCE\AB\BuildType\TFSBuild.proj]

My initial thought was that the build attempted to delete a workspace which does not (yet) exist, however it would appear that it does exist and just failed to delete the previous verison of the build due to a mapping error. Any ideas as to where I can change this?

Thanks, Matt

This can still happen with TFS 2010 if you change the build server account. In this case it is probably best to clear out the old workspaces.