...
>ANS1030E System ran out of memery.
...

Matt - Do 'ulimit -a' in the process C shell (or equivalent command in another 
shell)
       to fully assure that your virtual storage is unlimited, as you believe.

If system virtual storage were actually exhausted, you'd be seeing a lot of 
surrounding
AIX processes being blown away, as reflected in the pacct file and Error Log.  
I don't
think you're seeing that.

Go to www.ibm.com and search on that message number.  You'll come upon an 
interesting
AIX situation as well.

   Richard Sims