This is a long shot on your JAVA problem but ....
I've had similar problems in Beta Testing on the ALLBASE products which
also run on HP-UX. For some reason, ACD's seem to get in the way even if
they 'look' OK. RESTORE ing the files from a backup tape with the NOACD
option seems to clear up this ugliness.
I've never tried to isolate the problem, but I suspect it is some MPE/POSIX
interoperability problem. It's painless so it might be worth a try.
Gary L. Biggs, N5TTO
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Interex SIG Allbase Chair
"Abandon all hope, Ye who Inter(net) here" --
Dante, over the portal(router) to Hell