Batch, IMS and TSO applications containing CMP modules may fail to execute successfully.
PTF RO93797 has the following fix:
The version of TIRLGLOD used to call Compatibility (CMP) modules in
Batch, IMS and TSO applications (TIRLILOD) contains a static call to
IGZCXCC. This can cause upward compatibility problems when moving
from one release of Language Environment (LE) to another. Problems
have been reported in applications that contain a mixture of LE 2.1
and earlier LE releases.
When was the IGZCXCC module first statically linked into the CA GEN batch, IMS, and TSO programs?
The problem/concern was originally reported with CA GEN 8.5, and the problem was introduced when the newer releases of z/OS were involved (2.1/2.2).
The module TIRLGLOD was originally statically linked since CA GEN 7.6.
This module was then divided into two modules starting in release 8.0: TIRLILOD (IMS) & TIRLCLOD (CICS).