Server crash

Hello, I have a big problem with an informix server wich crashes every day when some batch run. For example, we have a program wich make an unload of all tables. The server crashes but not related to a specific table. It's an IDS 7.31TD4 on a Windows 2000 server. I have two messages where only the context changes : 10:54:20 Assert Failed: No Exception Handler 10:54:20 Informix Dynamic Server Version 7.31.TD4 10:54:20 Who: Session(14, rgm@srv2000.coriex.local, 2540, 0) Thread(34, sqlexec, 0, 1) Exception at Addr: 0x1085dab6, TOS: 0x1085da68, FP:0x1051a018, Exc: c000001d 10:54:20 Results: Exception Caught. Type: MT_EX_OS, Context: ill 10:54:20 Action: Please notify Informix Technical Support. 10:54:22 Releasing server from system block 10:54:27 See Also: af.40a9bbb, shmem.40a9bbb.0 10:54:27 , line -1, thread 34, proc id 1064, No Exception Handler. 10:54:27 PANIC: Attempting to bring system down 14:48:08 Assert Failed: No Exception Handler 14:48:08 Informix Dynamic Server Version 7.31.TD4 14:48:08 Who: Session(31, coriex1@srv2000.coriex.local, 2632, 0) Thread(51, sqlexec, 0, 1) Exception at Addr: 0xc1d434c, TOS: 0x10a77a54, FP:0x10a77a58, Exc: c0000005 14:48:08 Results: Exception Caught. Type: MT_EX_OS, Context: mem 14:48:08 Action: Please notify Informix Technical Support. 14:48:12 Releasing server from system block 14:48:16 See Also: af.41b8108, shmem.41b8108.0 14:48:17 , line -1, thread 51, proc id 2808, No Exception Handler. 14:48:17 PANIC: Attempting to bring system down I don't find any information about what is the context. Does anybody had the same problem with this version ? Philippe Mazellier RGM Informatique