CASKC0018E Service (service-name) IDT load failed reason code: reason-code.

The system attempted load the Interface Definition Table (IDT) for Service service-name. The file system open for the disk image failed with a reason code of reason-code. The reason-code will be displayed in decimal. The hexidecimal representation of the error might indicate a COBOL RTS error, for example 0x390D is a 9/13 which means file not found.
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.