Example: how CHNGDUMP commands affect dump modes and options

Table 1 (using SYSABEND) shows how dump modes and system dump options are set during system initialization and then changed by CHNGDUMP commands or options specified on ABEND macro dump requests. The figure assumes that parmlib member IEAABD00 specifies dump options CB, DM, ENQ, ERR, IO, LSQA, SUM, and TRT. The figure lists system and operator actions and explains each action the system takes.

The FUNCTION column lists the IPL process, CHNGDUMP commands, and dump requests (from the ABEND macro instruction) as they occur.
The OPTIONS column identifies the SYSABEND dump options in effect at each point in the example.
The MODE column identifies the dump mode in effect at each point in the example.

Table 1. Example of How CHNGDUMP Commands Affect Dump Modes and Options
FUNCTION (* indicates operator commands/actions)	OPTIONS	MODE
* IPL During IPL, parmlib options are set on, and mode is set to ADD.	`CB IO DM LSQA ENQ SUM ERR TRT`	ADD
ABEND SDATA=(NUC,SWA) Because mode is ADD, options specified on dump request are added to options set on in options list to determine areas to dump.	`CB LSQA DM NUC ENQ SUM ERR SWA IO TRT`	ADD
* CD SET,SYSABEND,SDATA=PCDATA An additional option is set on in options list.	`CB LSQA DM PCDATA ENQ SUM ERR TRT IO`	ADD
ABEND Because dump request specified no additional options, only options set on in options list determine areas to dump.	`CB LSQA DM PCDATA ENQ SUM ERR TRT IO`	ADD
ABEND SDATA=(NUC,SWA) Because mode is ADD, options specified on dump request are added to options set on in options list to determine areas to dump.	`CB NUC DM PCDATA ENQ SUM ERR SWA IO TRT LSQA`	ADD
* CD SET,SYSABEND,OVER,SDATA=(CB,IO) Mode is changed to OVER and parmlib options are deleted from options lists. Only options set by previous CD commands remain on in options list; CD commands are cumulative. Options in options list are combined with override options to determine areas to dump.	`CB IO PCDATA`	OVER
ABEND SDATA=(SWA,TRT) Because mode is OVER, options specified on dump request are ignored. Options set on in options list determine areas to dump.	`CB IO PCDATA`	OVER
* CD SET,SYSABEND,SDATA=(ENQ, LSQA),OVER Two more options are set on in options list, and mode is unchanged.	`CB LSQA ENQ PCDATA IO`	OVER
* CD SET,SYSABEND,SDATA=NUC Mode is changed to ADD (the default) for SYSABEND, parmlib options are set on, and CD command options are set on. Previous CD command options remain on.	`CB LSQA DM NUC ENQ PCDATA ERR SUM IO TRT`	ADD
ABEND SDATA=(CB,SWA,NUC) Because mode is ADD, options specified on dump request are added to options set on in options list to determine areas to dump.	`CB NUC DM PCDATA ENQ SUM ERR SWA IO TRT LSQA`	ADD
* CD SET,SYSABEND,NODUMP Mode is changed to NODUMP. All options in options list are set off.		NODUMP
ABEND SDATA=(CB,SWA,NUC) Because mode is NODUMP, request is ignored.		NODUMP
* CD SET,SYSABEND,SDATA=SQA Mode is changed to ADD. Parmlib options on this CD command are set.	`CB LSQA DM SQA ENQ SUM ERR TRT IO`	ADD
* CD DEL,SYSABEND,SDATA=(DM,IO) Because DEL is specified, specified options in options list are set off.	`CB SQA ENQ SUM ERR TRT LSQA`	ADD
* CD DEL,SYSABEND,SDATA=(SQA, LSQA,TRT, CB,ENQ,ERR,SUM) Specified options are set off in options list.		ADD
ABEND SDATA=(SQA) The option specified in the dump request determines the area to dump. There are no options on in the options list.	SQA	ADD
* CD RESET,SYSABEND Mode and options list are reset to values established at system initialization.	`CB IO DM LSQA ENQ SUM ERR TRT`	ADD