I found this in the "readme" for the AIX 5.2.3.1 client:

==============================================================================
IBM Tivoli Storage Manager (TSM) README
32bit Backup-Archive Client for AIX 5.1 and AIX 5.2  PPC

Version 5, Release 2, Level 3.1                                  Interim
Fix 1
******************************************************************************
* This TSM Interim Fix addresses the following problems/issues:

* IC40710 IRIX CLIENT SCHEDULER CORE DUMPS AFTER BACKUP.

Well, I am confused since there is no 5.2.3 IRIX client, that I can find
on service.boulder.ibm.com ?  AFAIK, the SGI IRIX client has been frozen
at 5.1.6 ?

Can someone from IBM explain this or enlighten me to the location of the
5.2.3 SGI IRIX client ?