EDIF and BRIF invoke routines supplied on the service invocation
to perform I/O and primary command processing. Specific return codes
are expected of these routines and are grouped into four categories:
- 0
- Normal completion.
- 4
- ISPF should process the request.
- 8
- End of file.
- 12, 16, and 20
- Error conditions; the specified functions did not complete because
of errors.
Return codes for these functions are described in greater detail
in the EDIF and BRIF sections in Description of the ISPF services.