WRITE completion codes—write a block (create a direct data set with BSAM)

After the write has been scheduled and control returns to your problem program, the three high-order bytes of register 15 are set to 0. The low-order byte contains a return code.

The WRITE return codes are as follows. For fixed-length records, the return codes are unpredictable.

Return Code (15)	Fixed-Length (SF or SD)	Variable or Undefined- length (SF or SFR)	Variable or Undefined- length (SZ)
00 (X'00')	Block is written. (If the previous return code was 08, a block is written only if the DD statement specifies secondary space allocation and sufficient space is available.)	Block is written. (If the previous return code was 08, a block is written only if the DD statement specifies secondary space allocation and sufficient space is available.)	Capacity record was written; another track is available.
04 (X'04')	Block is written, followed by a capacity record. (If the previous return code was 08, a block is written only if the DD statement specifies secondary space allocation and sufficient space is available.)	Block was not written; write a capacity record (SZ) to describe the current track, then reissue the WRITE macro.	—
08 (X'08')	Block is written, followed by a capacity record. The next block requires secondary space allocation.	—	Capacity record was written. The next block requires secondary space allocation. This code is not issued if the WRITE macro is issued on a one-track secondary extent.
12 (X'0C')	Block is not written; issue a CHECK macro for the previous WRITE macro, then reissue the WRITE macro.	Block is not written; issue a CHECK macro for the previous WRITE macro, then reissue the WRITE macro.	Block is not written; issue a CHECK macro for the previous WRITE macro, then reissue the WRITE macro.