URGENT: Informix server problem

Hi, We have a problem with Informix 7.30 UC 6X1 on HP-UX 10.20. Below is the extract from the server log : Thanks for any help ------------------------------------------------------------- 16:41:45 Informix Dynamic Server Version 7.30.UC6X1 Software Serial Number AAC#J400948 16:41:46 Informix Dynamic Server Initialized -- Shared Memory Initialized. 16:41:46 Physical Recovery Started. 16:41:47 Physical Recovery Complete: 0 Pages Restored. 16:41:47 Logical Recovery Started. 16:41:50 Assert Failed: Page Check Error in undopgalter: slots overlap 16:41:50 Informix Dynamic Server Version 7.30.UC6X1 16:41:50 Who: Session(7, informix@obelix, 0, 0) Thread(17, fast_rec, 0, 1) File: rsdebug.c Line: 942 16:41:50 Results: Possible inconsistencies in 'scl:"".' 16:41:50 Action: Run 'oncheck -cD 1049875' 16:43:47 See Also: /tmp/af.11a4f5 16:43:47 rstrans.c, line 7788, thread 17, proc id 2045, Dynamic Server mustabo rt. 16:43:47 Assert Failed: Dynamic Server must abort 16:43:47 Informix Dynamic Server Version 7.30.UC6X1 16:43:47 Who: Session(7, informix@obelix, 0, 0) Thread(17, fast_rec, 0, 1) File: called by ASF mt_affail Line: 0 16:43:47 Results: Fatal Internal Error requires system shutdown 16:43:47 Action: Restart OnLine 16:45:39 See Also: /tmp/af.11a4f5 16:45:39 rstrans.c, line 7788, thread 17, proc id 2045, Dynamic Server mustabo rt. 16:45:39 PANIC: Attempting to bring system down -------------------------------------------------------------