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

Products

• Allocate DASD Space and Placement

Issue/Introduction

From r12.0 and later, the use of this DD card is obsolete:  //VDSDIAGS DD DUMMY 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.

 

Resolution

When Broadcom Support requests diagnostics that will help determine Allocate problems, please do: 

Add these entries in Vkgparms and leave them:

PLSOPT98 (Y)             * DIAGS ONLY TO JESYSMSG                 
PLSOPT99 (Y)             * EXTENDED DIAGNOSTICS WILL BE CREATED

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.

When Support suspects a problem with the VAM task itself, they will request that the
//VDSDIAGS DD DUMMY  card be inserted in the VAM JCL.  The complete output of the VAM task needs to be sent in.