The RDJFCB macro uses the DCB exit list entry with code X'13' to retrieve allocation information (JFCBs and volume serial numbers). When you issue RDJFCB, the JFCBs for the specified data sets, including concatenated data sets, and their volume serial numbers are placed in the area located at the address specified in the allocation retrieval list. The DCB exit list entry contains the address of the allocation retrieval list. The RDJFCB macro passes the following return codes in register 15:

Return code

Meaning

0 (X'00')

RDJFCB has completed the allocation retrieval list successfully.

4 (X'04')

One or more DCBs had one of the following conditions and were skipped:

• DCB currently being processed by O/C/EOV or a similar function.
• No data set is allocated with the ddname that is in the DCB.
• The DCB is not open and its ddname is blank.

DCBs that were not skipped were handled successfully.

8 (X'08')

One or more DCBs had an allocation retrieval list which could not be handled. Each allocation retrieval list contains a reason code to describe its status. One or more DCBs may have an error described by return code 4, in which case their allocation retrieval lists will not have a reason code.