Here's where you get to learn about udebug... But first, what's in your /usr/afs/etc/CellServDB file? It sounds like there is more than one server listed there. If it's not that simple, then read this page, and see how far you get. Note that the port of interest here is port 7004. http://www.transarc.ibm.com/Support/afs/debug/udebug.html