20A

Explanation
An error occurred when the system tried to process
an R form of the GETMAIN or FREEMAIN macro. During request processing,
the system attempted to get local system queue area storage (LSQA)
to support the request, but no central storage is available to back
the LSQA storage.

System action
The system abnormally ends the address space where
the job was running.

System programmer response
Search problem reporting data bases
for a fix for the problem.  If no fix exists, contact the IBM® Support Center.

Programmer response
Run the job step again. If the system issues
this abend again, notify the system programmer.

Source
Virtual storage manager (VSM)