In addition to the automatic dumps previously described, you can also optionally specify whether VSAM Record Management dynamic dumping is to occur for specific events identified by a combination of a return code, error (reason) code, problem determination function (PDF or FUNC) code, and component code returned in the request parameter list (RPL) feedback area. (See Return codes from the record-management (request) macros.)
You can request a user directed dump (or change the parameters for an existing dump request) with the MODIFY CATALOG,VDUMPON command. You can turn off the dump request with the MODIFY CATALOG,VDUMPOFF command. See z/OS MVS System Commands for a complete description of the MODIFY CATALOG,VDUMPON and MODIFY CATALOG,VDUMPOFF commands.
MODIFY CATALOG,VDUMPON(**,8,**,20)
requests
a dump for any return code 8, error code 20 (exclusive control conflict),
with any PDF code and any component code. IEC351I CATALOG ADDRESS SPACE MODIFY COMMAND ACTIVE
IEC359I CATALOG REPORT VDUMP OUTPUT 503
*CAS*************************************************************
* STATUS FUNC CODE RETURN CODE COMPONENT ERROR CODE *
* ON *** 008 *** 020 *
*CAS*************************************************************
IEC352I CATALOG ADDRESS SPACE MODIFY COMMAND COMPLETED
If a dump is later generated, z/OS will issue a message similar to that generated for an automatic dump.