AC8

Explanation
Unicode Services detected an error in processing. Code
Explanation
04
Unicode detected an unexpected return code from the IEANTRT service
and register 3 contains the return code.
08
Unicode detected critical overlay information.

System action
The system abnormally ends the task.

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

Source
Unicode Services