CASKC0021E Service (service-name) IDT read failed reason code: reason-code.

The system attempted to load the Interface Definition Table (IDT) for Service service-name. The file system read for the disk image failed with a reason code of reason-code.
System Action:
The service request is failed.
Resolution:
Correct the location or deployment error and retry the request.
Module:
dfheserv
Destination:
System Console and standard error.