C2D

Explanation
A program requested an overlay. In answer to the request, the overlay supervisor
was using program fetch to load a program segment from the library. Fetch could not get enough
storage for the module or control blocks.
Note: Overlay programs run only in 24-bit addressing
mode, not in 31-bit addressing mode.

System action
The system abnormally ends the program that requested the overlay. The system
writes an ABEND dump, if a dump DD statement is provided.

Programmer response
Determine why no storage was available. Correct the errors; then assemble,
link edit, and run the program again.

Source
Overlay supervisor