Is a solution of CMPIMS#566 "SHRSTUB0 MEMORY LEAK" problem included in CASTK00 r20?
Release : 20.0
Component : Compress Data Compression for IMS
CMPIMS#566 (RO73856) was released in 2014 for IMS Tools r18.0.
It is currently present in the code base of r20. So when Compress for IMS 20.0 is installed, it's already there.