ontape brought the IDS instance down

Hi Forum, I got a somewhat strange issue. I was running a level -0 archive with ontape and after 10% completion, the Informix instance crashed with the following error messages. The message it displayed on the screen was: Archive failed. - buc_fe.c: Archive API processing failed at line 298 for msgtype The online log says the following. 17:48:14 Logical Log 593450 Complete. 17:48:16 Logical Log 593450 - Backup Started 17:48:16 Logical Log 593450 - Backup Completed 17:50:30 Logical Log 593451 Complete. 17:50:31 Logical Log 593451 - Backup Started 17:50:31 Logical Log 593451 - Backup Completed 17:50:43 Exception Recursion while handling: MT_EX_OS, Context: mem 17:50:43 PANIC: Attempting to bring system down I recently changed the ontape block size from 512 K TO 1024 K. Could this be the reason for this behaviour. There were no error messages prior to this. I am using IDS 7.31 UD6 on Red Hat Linux Advanced Server release 2.1AS/i686. Subsequent backups using ontape worked after the above failure. Any ideas guys? Regards, sputnik2005