VBP (64-bit) doesn't terminate at end of build

[jbenson]

This is strange. Last Friday I added a new final step to my build project, a "Kill Process" step with [Builder.ProcessID] as the value. Tested the step in the VBP designer - VBP terminated. Let the build run over the weekend and again this morning for good measure, just to be sure what I was seeing. Despite the attempt to kill the process, VisBuildCmd.exe always remains running in Task Manager (and Task Scheduler says the latest task is still running). Monday morning there was three instances of VisBuildCmd.exe running (Saturday, Sunday and Monday builds). I rebooted the VM Monday and now (Tuesday) one VisBuildCmd.exe is running under this morning's scheduled task.

I am officially out of ideas. What could be going on?