A00

Explanation
A dynamic address translation (DAT) error occurred
for a system address space. The recovery termination manager (RTM)
does not end the address space because the ASCBNOMT and ASCBNOMD fields
of the address space control block (ASCB) show that the MEMTERM option
of the CALLRTM macro is not valid for the address space. The address
space is critical for system operation.

System action
The system may issue message IEA802W. The system
enters the wait state.

Operator response
If requested by the system programmer, obtain
the stand-alone dump. ReIPL the system.

System programmer response
Search problem reporting databases
for a fix for the problem. If no fix exists, contact the IBM® Support Center. Provide the stand-alone dump.

Source
Recovery termination manager (RTM)