CASSI5008E Severe error occured during PLTPI processing, region terminating

During PLTPI (phase 1) processing a severe error was detected, either a PLTPI program could not be loaded or an ABEND occured The startup regime specified that the region initialization should be aborted.
System Action:
Stop the region.
Resolution:
Ensure that the PLTPI program is compiled and the load module is in the correct location or correct whatever is causing the abend.
Module:
dfhzplt
Destination:
System Console.