Thanks for all your help both with the original problem and with the debugger. I may still use the GUI debugger in J602 for a while (when I need a debugger) as I find it convenient; otherwise I am happy with 8.02.
As for removing all of R before installing a new version, I meant before installing a new version of R. And when doing so on more than one machine I received a message saying that I couldn't delete the folder because some active process was using it; so there is something in R that runs in the background and may be connected to my problems. At any rate I shutdown and restarted my system, removed the old R, installed the new one with the packages Rserve and actuar, started Rserve, and everything worked fine in J. Richard Vaughan ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
