The external CICS® interface produces MVS™ SYSMDUMPs for some error conditions and MVS SDUMPs for other, more serious conditions. These dumps contain all the external CICS interface control blocks, as well as trace entries.
You can use the CICS IPCS verb exit, DFHPD640, to format the system dumps. The following keywords are available for use when formatting an external CICS interface dump using DFHPD640:
If the external CICS interface takes a system dump when there is more than one TCB in use, it dumps only the control blocks and trace table for the TCB that requested the dump.
If you take a dump of the external CICS address space using a console command, the CICS verb exit routine, DFHPD640 formats the control blocks and trace tables for every TCB it finds in the dump.
To capture SYSMDUMPs produced by the external CICS interface, ensure you always include a DD statement for the SYSMDUMP data set in the client application program's JCL.
In addition to the dumps taken automatically by the external CICS interface, you can also force a dump of an address space running a client application program by means of an MVS DUMP command entered at the console. You can use the CICS IPCS verb exit routine DFHPD640 to format dumps taken in this way.
You can use the console to issue the DUMP command also to dump the CICS server address space as well as the client address space, and use the CICS IPCS verb exit routine DFHPD640 to format both address space dumps together.
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