This happened to me some time in June, when I was in Colorado working on a web site..........
It just said process completed and I couldn't do jack shit.
I don't know a lot about UNIX, but I just reinstalled OS X.
OS X Install CD knows if it is a first install or a install-over.
If you just run the installer CD it fixes any broken files, keeps all your preferences, and fixes everything. (You might lose a couple of preferences and that's it).
-solrac-