ILR027D

Explanation
The FMID value in the nucleus does not match the
FMID used when the PLPA was created. The FMID of the nucleus and PLPA
must match for proper system operation. This may be caused by: Not specifying CLPA when IPLing a new release of MVS™.
IPLing the wrong nucleus.

System action
This message requests a response from the operator.
If the operator replies GO, the  system issues message IEA929I (CLPA
FORCED), changes the IPL to a cold start, and  continues paging initialization.
Otherwise, the operator must re-IPL.

Operator response
Determine if the nucleus was specified at
IPL. If not, specify the correct nucleus and re-IPL. If the correct
nucleus was specified at IPL, notify the system programmer.

System programmer response
If the problem cannot be resolved,
search the problem reporting databases for a fix for the  problem.
If no fix exists, contact the IBM® Support
Center.  

Source
Auxiliary Storage Management (ASM)

Module
ILRASRIM