Return Codes for General Purpose Register 15

On return, general-purpose register 15 can contain the following:

Return Code: Description
0: No errors or return messages
4: Information was returned from Catalog Management processing. Further information is returned in the 4-byte reason area pointed to by the first address in the parameter list. See Table 1 for the interpretation of this information.
8: Failure in Catalog Search Interface routine. Further information is returned in the 4-byte reason area pointed to by the first address in the parameter list. See Return Code 8 for the interpretation of this information.
C: Error in Catalog Search Interface routine parameter list - check for zero entries.
10: Parameter list pointer in general-purpose register 1 is zero.