Return Codes from CVAFFILT

CVAF filter service does not issue any messages. Upon return from CVAF, register 1 contains the address of the CVAF parameter list and register 15 contains one of the following return codes:

Return Code	Meaning
0 (X'00')	The request was successful.
4 (X'04')	Logical error; status information in CVSTAT.
8 (X'08')	Invalid VTOC structure.
12 (X'0C')	CVAFFILT parameter list in wrong key, or not valid.
16 (X'10')	I/O error.

CVSTAT in the CVAF parameter list contains the status code. See Codes Put in the CVSTAT Field for a list of the status codes.