The "//VDSDIAGS DD DUMMY" has been obsoleted for diagnostic trace method

Document ID : KB000019577
Last Modified Date : 14/02/2018
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From r12.0 and later, the use of this DD card is obsolete:  //VDSDIAGS DD DUMMY 

This is because of several changes that were made for performance enhancements.

The following process provides much more extensive diagnostic info for Support.


When L1/L2 request diagnostics that will help determine Allocate problems, please do this:

Add these entries in Vkgparms and leave them:

PLSOPT98 (Y)             * DIAGS ONLY TO JESYSMSG                 

If either of these is a new entry, then issue command: F vam,PARMREF

To generate diagnostics, issue console command: F vam,DIAGS=jobname
Run your job and DIAGS will be written to the joblog.
Then issue command:  F vam,DIAGS=   and hit enter to null the diagnostics.
Then send in the entire job output to support.

Additional Information:

On occasion that L2 suspects a problem with the VAM task itself, they will request that the
//VDSDIAGS DD DUMMY  card be inserted in the VAM JCL.  Then, the user would send in
the complete output of the VAM task.