90A

Explanation
An error occurred when the system tried to process
an R form of the FREEMAIN macro. A reason code in the SDWACRC field
of the system diagnostic work area (SDWA) explains the error: Code
Explanation
04
The virtual storage area that the FREEMAIN macro tried to release
is not on a doubleword boundary.

System action
The system issues message IEA705I. The system
abnormally ends the current task.

Programmer response
Check for program errors that incorrectly
modify the macro expansion. Correct them. If necessary, change the
program to request less virtual storage.

Source
Virtual storage manager (VSM)