ADRREBLK Return Codes

Return Code: Description
0: Block size not changed. Use the DFSMSdss-selected block size.
4: Block size has been changed by the exit; the new block size is indicated in last 2 bytes of word 6 of the parameter list.
8: Use the input block size (do not reblock).
12: System determined block size is used. In addition, the reblockable indicator in the Format 1 DSCB (DS1REBLK) is turned on.