We have a recurring and intermittent problem where our Windows remote agents fail to delete the output of a previous build with the error 'Unable to clean source directory 'c:\buildarea' Unable to delete file: '
Subsequent rebuilds will usually succeed on the same agent.
When we've managed to catch this problem on an agent the directory will be locked by the process CcmExec.exe
Is this issue known and if so do you have any advice on how we might avoid it?

Bamboo server version 5.3 build 4101 - 09 Dec 13