Why is the post-Install 0000 compare task encountering an abend S0C4-11 on either the COMPRT or DDLCOMP steps?

Products

• RC Compare for DB2 for z/OS
• Database Analyzer for DB2 for z/OS
• Fast Unload for DB2 for z/OS
• Fast Check for DB2 for z/OS
• Fast Index for DB2 for z/OS
• Rapid Reorg for DB2 for z/OS

Issue/Introduction

The Post-Install ssid0000 compare job abends on either the COMPRT or DDLCOMP steps with a S0C4-11 NO ACTIVE MODULE FOUND NAME=UNKNOWN RCM00054: RC/Migrator module RML#MERG has abended.    

Environment

z/OS 2.1, DB2 Tools r18, r19, DB2 V10, V11

Cause

The cause of the Abend S0C4-11 was due to a third party vendor's product (Performance Essentials) interfering with the Post-Install ssid0000 Compare process of opening and writing to the &&MERGE dataset as defined in the COMPRT and DDLCOMP steps.

Resolution

To circumvent this third party's process and alleviate the Abend S0C4-11 the following DD was added to the impacted steps:

//PSPOFF DD DUMMY