5C7

Explanation
An error occurred during processor or system termination.
The right-most
four bytes of the program status word (PSW) has one of the following formats:
rrrr0www
8rrrrwww
0rrrrwww
 where: rrrr
A hexadecimal reason code indicating the reason for the failure.
www
The wait state code.

In
z/Architecture® mode, the reason code
(rrrr) is one of the following: 0101
Three processors each attempted to load a wait state. There is not enough storage available to
support the third request.
0201
Two concurrent wait state requests were in progress.
0907
An error occurred during ACR processing.
1904
An error occurred while the system was processing a write to operator (WTO) to display a message
and load a system wait state.
1905
An error occurred in the processor stop routine.
1906
The system could not start alternate CPU recovery (ACR) on a target processor.

System action
For reason code X'0101', the system rejects the third request and loads
temporary disabled wait state X'5C7' on one processor. Then the system (all processors)
enters the first successfully loaded wait state.
For reason code X'0201', the system
rejects one of the requests and loads temporary disabled wait state X'5C7' on one
processor. Then the system (all processors) enters the other requested wait state.
For all
other reason codes, the system enters a non-restartable wait state X'5C7'. For reason
codes X'9906' and X'1906' the system also issues message
BLW006W.

Operator response
Notify the system programmer. If necessary, obtain a stand-alone dump. ReIPL
the system.

System programmer response
For reason code X'0101'and X'0201', see the system
programmer response for the wait state that the processor enters after wait state X'5C7'.
For all other reason codes, search problem reporting databases for a fix for the problem. If no fix
exists, contact the IBM® Support
Center.

Source
Loadwait/Restart