When migrating to IMS v15.1 from 14.1, a S0C4 abend is received when an IMS BMP region starts.
Release : 16.0
Component : CA Top Secret for z/OS
IMS message region abends with S0C4 at offset x'84A' in TSSD140Z or TSS150Z after RSU1912 during startup.
The PTFs SO12118 and SO11952 should solve this abend.