Examples of the SYSABEND, SYSMDUMP, and SYSUDUMP DD statements

Example 1

//STEP2    EXEC PGM=A
//SYSUDUMP DD   SYSOUT=A

The SYSUDUMP DD statement specifies that you want the dump routed to system output class A.

Example 2

//SYSMDUMP DD  DSNAME=DUMP,DISP=(NEW,KEEP),
//          UNIT=3390,VOLUME=SER=147958

The SYSMDUMP DD statement specifies that the dump is to be stored on a tape. Because the LABEL parameter is not coded, the tape must have IBM® standard labels.

Example 3

//STEP1    EXEC PGM=PROGRAM1
//SYSABEND DD   DSNAME=DUMP,UNIT=3390,DISP=(,PASS,KEEP),
//          VOLUME=SER=1234,SPACE=(TRK,(40,20))
//STEP2    EXEC PGM=PROGRAM2
//SYSABEND DD   DSNAME=*.STEP1.SYSABEND,DISP=(OLD,DELETE,KEEP)

Both SYSABEND DD statements specify that the dump is to be stored. The space request in STEP1 is ample and will not inhibit dumping due to insufficient space. If STEP1 does not abnormally terminate but STEP2 does, the system writes the dump for STEP2 in the space allocated in STEP1. In both steps, an abnormal termination disposition of KEEP is specified so that the dump is stored if either of the steps abnormally terminates. If both of the steps successfully execute, the second DISP subparameter, DELETE, in STEP2 instructs the system to delete the data set and free the space acquired for dumping.

Example 4

//STEP     EXEC PGM=EXSYSM
//SYSMDUMP DD   UNIT=3390,VOLUME=SER=123456,SPACE=(CYL,(0,1)),
//           DISP=(NEW,DELETE,KEEP),DSNAME=MDUMP

The SYSMDUMP DD statement allocates dump data set MDUMP to a direct access device.

Example 5

//JOB1     JOB
//STEP     EXEC PGM=EXSYSMDP
//SYSMDUMP DD   DSNAME=SYS1.SYSMDP00,DISP=SHR

//JOB2     JOB
//STEP     EXEC PGM=EXSYSMDP
//SYSMDUMP DD   DSNAME=SYS1.SYSMDP00,DISP=SHR

Only the SYSMDUMP dump written by the first job will be in data set SYS1.SYSMDP00. All subsequent jobs receive message IEA849I, indicating that the data set is full.

Note: When you specify a DSNAME of SYS1.SYSMDPxx with DISP=SHR, the system writes the first SYSMDUMP dump on the data set. You must offload this first SYSMDUMP dump and write an EOF mark at the beginning of the SYS1.SYSMDPxx data set before subsequent dumps can be written to that data set.