A2A

Explanation
The system detected a page within the range of the pageable link pack area
(PLPA), extended PLPA, the modified link pack area (MLPA), or the extended MLPA that was never paged
into auxiliary storage. Ranges of system storage that are page protected must have a copy on
auxiliary storage so the system can refresh the page if necessary.

System action
The system enters wait state X'A2A'.

Operator response
If requested by the system programmer, obtain a stand-alone dump. Try to
reIPL the system using the no-protect option on the MLPA system parameter in the IEASYSxx parmlib
member. See the explanation of messages IAR012W and IEA928I for more
information.

System programmer response
Fix the MLPA parameter in the IEASYSxx parmlib member so that the
error does not recur. If the error does recur, search problem reporting databases for a fix for the
problem. If no fix exists, ask the operator to obtain a stand-alone dump. Contact the IBM® Support Center. Provide the
dump.

Source
Real storage manager (RSM)