CASCS3001E Region region-name not found, allocate from partner partner-lu-alias for transaction transaction-id rejected

An inbound allocate was received from region-name for region partner-lu-alias was rejected because the designate target region was either not valid or not active. The transaction specified is transaction-id.
System Action:
The conversation is deallocated with an abend.
Resolution:
Start the region or correct the specification for the started transaction program.
Module:
dfhgatch
Destination:
Console