CASST0015E Error attempting to shutdown `region-name`, could not submit shutdown request

While attempting to shutdown a region an error occurred trying to submit the shutdown request.

System Action:: As the shut down program cannot attach to the region the region cannot be shutdown.
Resolution:: A forced region shutdown may be required.
Module:: casstop
Destination:: Console

CASST0015E Error attempting to shutdown region-name, could not submit shutdown request