I have set up a continuous integration build with TeamCity that gets source files from ClearCase.
This set up has seemed to work fine for a couple of months.
Now, it seems that TeamCity does not always get all files it should from ClearCase. Sometimes old files are missing.
My first workaround was to uncheck Clean all files before build. But that worked only until even updated files started missing from what TeamCity got.
I have spoken to the ClearCase administrators and they claim that they have made no changes to the environment.
I don't really know even how to start analyzing this problem. It seems that the ClearCase connection has become progressively worse for no apparent reason.