I am getting "TF42045: A build for the team project: xxx is in progress on build machine: yyy. On each build machine, only one build can be active for each team project. Use a different build machine or try again later." and I can no longer execute any builds for the Team project.

I have restarted the TFSBuildService and the build server, enabled tracing on the application server, which again logs the above message and there are no alerts in the event viewer.

Can anyone suggest where I can look for this phantom build that is running??

I have also called the DeleteBuild web method in the BuildController to clean up previous build it that makes any difference.

thanks in advance.

It shouldn't be possible to get this exception if you restarted the "Team Build Service" (TfsBuildService.exe) - are you sure you restarted the service on the correct build machine?

-Aaron

That message comes from the application tier. The AT believes that there is a build running on that machine. You should be able to fix the issue by either stopping the build, if you know the build number, or restarting TFS on the AT (iisreset should do it).

Buck