CRASH...HELP

This happened last month, and I thought I had it figured out after some of your help. Then it happened again yesterday. I run Informix 7.1 on digital Unix 1000 server. Here is my online.log and the af. file. 09:13:05 Checkpoint Completed: duration was 0 seconds. 09:13:18 Assert Failed: WARNING! Internal Error - Arithmetic Exception 09:13:18 Who: Session(697, pin@admsrv1.sph.hrs, 13400, 24) Thread(794, sqlexec, 8314d8, 1) 09:13:18 Results: Internally corrected 09:13:18 See Also: /tmp/af.483abcf 09:13:21 session.c, line 704, thread 794, proc id 1196, (destroy_session) Mem . 09:13:21 PANIC: Attempting to bring system down Mon Apr 19 09:43:51 1999 09:43:51 DR: DRAUTO is 0 (Off) 09:43:56 INFORMIX-OnLine Initialized -- Shared Memory Initialized. 09:43:56 Physical Recovery Started. 09:43:56 Physical Recovery Complete: 0 Pages Restored. 09:43:56 Logical Recovery Started. 09:43:56 Logical Recovery allocating 10 worker threads ('OFF_RECVRY_THREADS'). 09:44:01 Logical Recovery Complete. 1 Committed, 0 Rolled Back, 0 Open, 0 Bad Locks 09:44:01 Dropping temporary TBLspace 200100, recovering 8 pages. 09:44:01 Dataskip is now OFF for all dbspaces 09:44:01 Quiescent Mode 09:44:01 Checkpoint Completed: duration was 0 seconds. 09:45:41 On-Line Mode 09:49:30 Checkpoint Completed: duration was 0 seconds. (/tmp) > more af.483abcf 09:13:18 09:13:18 Assert Failed: WARNING! Internal Error - Arithmetic Exception 09:13:18 Who: Session(697, pin@admsrv1.sph.hrs, 13400, 24) Thread(794, sqlexec, 8314d8, 1) 09:13:18 Results: Internally corrected 09:13:18 See Also: /tmp/af.483abcf 09:13:18 ------------------ End of assertion failure 0 ----------------- I brought it back up ok this time, but... What can I do? Or is this a job for tech support?