Assert Failed: Invalid Mutex Type - any ideas ???

On Solaris 7, IDS 2000 9.21 FC2-1: Wed Dec 6 14:45:18 2000 14:45:18 Fuzzy Checkpoint Completed: duration was 0 seconds, 95buffers not flushed. 14:45:18 Checkpoint loguniq 14, logpos 0x9f0514 14:50:18 Fuzzy Checkpoint Completed: duration was 0 seconds, 98buffers not flushed. 14:50:18 Checkpoint loguniq 14, logpos 0xa005cc 14:55:18 Fuzzy Checkpoint Completed: duration was 0 seconds, 101buffers not flushed. 14:55:18 Checkpoint loguniq 14, logpos 0xa33364 15:00:18 Fuzzy Checkpoint Completed: duration was 0 seconds, 101buffers not flushed. 15:00:18 Checkpoint loguniq 14, logpos 0xa34364 Thu Dec 7 01:05:18 2000 01:05:18 Fuzzy Checkpoint Completed: duration was 0 seconds, 116buffers not flushed. 01:05:18 Checkpoint loguniq 14, logpos 0xa553dc 01:10:18 Fuzzy Checkpoint Completed: duration was 0 seconds, 116buffers not flushed. 01:10:18 Checkpoint loguniq 14, logpos 0xa563dc 04:19:51 Assert Failed: Invalid Mutex Type 04:19:51 Informix Dynamic Server 2000 Version 9.21.FC2 04:19:51 Who: Session(7244, usr46020@carla, 26193, 253489064) Thread(7262, sqlexec, f183f48, 1) File: mt.c Line: 7218 04:19:51 stack trace for pid 6030 written to /tmp/af.20465636 04:19:52 See Also: /tmp/af.20465636Assertion Failure Type: CRASH Host Name: carla Database Server Name: infserv_tli Time of failure: Thursday December 7 04:19:57 EST 2000 AF file: /tmp/af.20465636 Shared memory file: None System Blocking: OFF 04:20:15 mt.c, line 7218, thread 7262, proc id 6030, Invalid Mutex Type. 04:20:15 The Master Daemon Died 04:20:16 PANIC: Attempting to bring system down 05:16:17 Informix Dynamic Server 2000 Started. 05:16:17 Requested shared memory segment size rounded from 76800KB to81920KB 05:16:18 Segment locked: addr=0xa000000, size=83886080 05:16:18 Requested shared memory segment size rounded from 8000KB to8192KB Thu Dec 7 05:16:18 2000 05:16:18 Event alarms enabled. ALARMPROG = '/opt/netmgt/informix/etc/no_log.sh' 05:16:18 Requested shared memory segment size rounded from 8204KB to9216KB 05:16:18 Dynamically allocated new virtual shared memory segment (size 9216KB) 05:16:19 Booting Language <c> from module <> 05:16:19 Loading Module <CNULL> 05:16:19 Booting Language <builtin> from module <> 05:16:19 Loading Module <BUILTINNULL> 05:16:24 Requested shared memory segment size rounded from 2256KB to3072KB 05:16:24 Dynamically allocated new message shared memory segment (size 3072KB) 05:16:24 Informix Dynamic Server 2000 Version 9.21.FC2 SoftwareSerial Number AAC#J937999 05:16:24 Informix Dynamic Server 2000 Version 9.21.FC2 SoftwareSerial Number AAC#J937999 05:16:25 Informix Dynamic Server 2000 Initialized -- Shared MemoryInitialized. 05:16:25 Physical Recovery Started. 05:16:25 Physical Recovery Complete: 0 Pages Restored. 05:16:25 Logical Recovery Started. 05:16:25 10 recovery worker threads will be started. 05:16:30 Logical Recovery Complete. 1174 Committed, 0 Rolled Back, 0 Open, 0 Bad Locks 05:16:31 Dataskip is now OFF for all dbspaces 05:16:31 Quiescent Mode 05:16:31 Checkpoint Completed: duration was 0 seconds. 05:16:31 Checkpoint loguniq 14, logpos 0xa57018 05:16:32 (11) connection rejected - no calls allowed for sqlexec 05:16:32 listener-thread: err = -27002: oserr = 0: errstr = : Noconnections are allowed in quiescent mode. 05:16:34 (19) connection rejected - no calls allowed for sqlexec 05:16:34 listener-thread: err = -27002: oserr = 0: errstr = : Noconnections are allowed in quiescent mode. 05:16:47 On-Line Mode