I could be anything. I assume your 937 didn't start on MPE/iX 5.0. Some programs that worked on 4.x could crash your system. For example, I had an old version of Glance that I didn't bother to upgrade with the operating system. Lo and behold, when someone tried to run the old Glance that was "used" to running on 4.0 WHAM! FLT DEAD. Back to determining the reason. If you have logging on, in particular if you are logging "File Opens" you can check the log file to see what was the last program file opened before it crashed. ---------- From: owner-hp3000-l[SMTP:[log in to unmask]] Sent: Friday, October 11, 1996 12:20 PM To: HP3000-L Subject: System halted Hi all you HP3000 gurus, I'm new on this list, so forgive me my possible blunders. And sorry for my clumsy English. When I came to work this morning I found our hp3000 out of running (937RX, MPE 5.0). The messages at the console were following: SYSTEM ABORT 1457 FROM SUBSYSTEM 102 SYSTEM HALT 7, $ 05B1 And at the bottom left corner there were blinking by turns: FLT BF04 FLT 0105 FLT 02B1 FLT DEAD I red in the Error Messages Manual that the subsystem 102 was the Process Manager but there were no error message '1457'. I performed the soft reset and the system has gone up without troubles. Everything is O.K. now (I hope) but I'd like to know what happend and why. And what to do if it happens next time. :) I don't know where to look for an explanation of the above. I'll be very grateful if someone tells me the that. TIA, Marek Bednarz Wroclaw University Library