listener-thread: err = -25546: oserr = 0: errstr =

Hi Team , The system runs IDS 7.31 on a linux- Dell Server with 4GB RAM. Initially following error was appeared in the online log. 15:30:15 listener-thread: err = 0: oserr = 0: errstr = : 15:30:16 listener-thread: err = -25546: oserr = 0: errstr = : Invalid ASF assoc_id. Then after 7 days since the first apperance of the above error message the server crahsed with the following information. 15:43:01 listener-thread: err = -25546: oserr = 0: errstr = : Invalid ASF assoc_id. 15:43:02 Assert Failed: No Exception Handler 15:43:02 Informix Dynamic Server Version 7.31.UD6 15:43:02 Who: Session(670361, informix@, 0, 0) Thread(49, soctcplst, 0, 1) File: mtex.c Line: 471 15:43:02 Results: Exception Caught. Type: MT_EX_OS, Context: mem 15:43:02 Action: Action: %s 15:43:10 See Also: /tmp/af.4197565, shmem.4197565.0 15:43:11 Checkpoint Completed: duration was 2 seconds. 15:43:11 Checkpoint loguniq 969132, logpos 0x1404f0 === Prior to this The error message - listener-thread: err = -25546: oserr = 0: errstr = : Invalid ASF assoc_id. repeated hundreds of thousands of times. My question is , what is this error message refers to.. I have seen someone else also posted this scenario before(only once) and it was never answered.[http://www.iiug.org/resources/cdi_archive/2005.11/cdii.141222] I really appreciates if any one can shed some light on this one.