CASKC0300E ES Thread Create for entry point "thread-entry-point-name" failed (RC: return-code) in module %3$S. Please contact Micro Focus SupportLine.

An ES threaded service process attempted to start a special purpose thread. The thread create operation reported an error.
Resolution:
Check the documentation for return-code values for Thread-control routines.
Module:
cascptrd
Destination:
System Console and standard error.