I believe there is a much newer version of gcc available. I would try using that first.
In my experience gcc is sometimes behind in the correct include file (.h) definitions because it wants to remake some of them rather than just use all of them.

The last part of the gcc install does this. Easiest way to get this fixed is probably to remove and reinstall gcc - and if you are going to do that - check on the newest version - I thought it was gcc 4.X.Y

This sort of thing used to happen often with performance related commands, where there was some mis-match with the kernel after an update of the commands.  Ultimately it's likely to require a patch of some kind, and probably a reboot.

1) regarding oslevel - TL06 has at least two additional patches
2) I am thinking more in terms of an application error atm.

My approach now would be to compile the package myself, if only for harvesting extra debug information, and see if I can still replicate the problem.

Any information useful for replicating the problem is much appreciated.

mate,
it didn't solve my problem. However, atleast you gave me some hints where i've never thought before...

Thanks Mate. 

Hi AIXer,

I encountered a weird problem in my AIX box where it's running on v5.3. This problem only occur on one specific useid called snswww which is used for application and it's only occur on specific hour. Outisde the period, it's working fine. I had set the ulimit value to unlimited for this particular userid but no luck. Does any expertise can help? Error message i attached below hope it help.

Thanks.
JChau

# lsof -n -u snswww
Memory fault(coredump)

$ ulimit -a
time(seconds)        unlimited
file(blocks)         unlimited
data(kbytes)         unlimited
stack(kbytes)        unlimited
memory(kbytes)       unlimited
coredump(blocks)     8192
nofiles(descriptors) 2000

============================================================
# errpt -aN SYSPROC |pg
---------------------------------------------------------------------------
LABEL:          CORE_DUMP
IDENTIFIER:     A63BEB70
 
Date/Time:       Wed May 30 07:50:51 2007
Sequence Number: 44731
Machine Id:      00CB73AD4C00
Node Id:         amsdc2-u-s00030
Class:           S
Type:            PERM
Resource Name:   SYSPROC
 
Description
SOFTWARE PROGRAM ABNORMALLY TERMINATED
 
Probable Causes
SOFTWARE PROGRAM
 
User Causes
USER GENERATED SIGNAL
 
        Recommended Actions
        CORRECT THEN RETRY
 
Failure Causes
SOFTWARE PROGRAM
 
        Recommended Actions
        RERUN THE APPLICATION PROGRAM
        IF PROBLEM PERSISTS THEN DO THE FOLLOWING
        CONTACT APPROPRIATE SERVICE REPRESENTATIVE
 
Detail Data
SIGNAL NUMBER
          11
USER'S PROCESS ID:
               1118382
FILE SYSTEM SERIAL NUMBER
           1
INODE NUMBER
           2
PROCESSOR ID
           0
CORE FILE NAME
/core
PROGRAM NAME
lsof64
STACK EXECUTION DISABLED
           0
ADDITIONAL INFORMATION
process_s 728
process_s 6B0
process_f 1F4
gather_pr 448
main 15BC
__start 94
 
Symptom Data
REPORTABLE
1
INTERNAL ERROR
0
SYMPTOM CODE
PCSS/SPI2 FLDS/lsof64 SIG/11 FLDS/process_s VALU/728 FLDS/process_f
=============================================================