I was running a cp on the server to move some files that got moved around during the down server upgrade. (public folder and sub folders) It ran for a while then stopped with the following:

The running process will be suspended.

9-27-2010 10:21:27 SERVER-5.70-4631 [nmID=1001C]
WARNING! Server MILLER experienced a critical error. The offending
process was suspended or recovered. However, services hosted by this
server may have been affected.

Server is still running, but wondering what caused this error. We are going to restart
to get the server prompt back to normal.