CASKC0020E Service (service-name) get IDT storage failed reason code: reason-code.

The system attempted to load the Interface Definition Table (IDT) for Service service-name. The allocate request for storage to hold the disk image failed with a reason code of reason-code.
System Action:
The service request is failed.
Resolution:
Increase the shared memory allocation for the Cobol Application Server.
Module:
dfheserv
Destination:
System Console and standard error.