MVS SYSTEM CODES-S804

The storage needed to execute the program was not available.

1. The region parameter did not specify enough storage.
2. The region parameter was omitted, and the default storage amount was too small to run the correct program.
3. Block sizes were increased or buffers were added, and the region size was not increased.
4. A logic error caused excessive storage to be obtained but not freed.

1. Increase the region size.
2. Look for logic errors which may cause excessive f calls to other programs or requests for storage.

Ref: www.ibmmainframes.com