Session Manager cannot establish connection after TSS CARS2306

Products

• Top Secret

Issue/Introduction

Using session manager product and it is running in only one LPAR whose name is ABCD.
Applying TSS CARS2306 to all our LPARs but after applying ABCD (Session manager LPAR) session manager could not establish connection.   The system was IPL'd again with old TSS CARS level and session manager worked fine so TSS CARS2306 is causing the session manager problem. These are the errors from the session manager address space: 

ISZ0030I TCPIP MANAGER active                               
ISZ0197I TCPIP MANAGER using TCP/IP for MVS (XXXX), id TCPIP
ISZ0071E TCPIP MANAGER INITXXX error, RC=-1, SC=156         
ISZ0031I TCPIP MANAGER terminated                           
ISZ0796I TCP unavailable (rc = 24,8), try again in 2 minutes

Environment

Release : 16.0

Resolution

The Session Manager acid only had one GROUP defined, the OMVSGRP.
The Default Group was GRPXXX.
The Default Group needs to be one of the groups that the acid has in its listing of groups.
Either give it the acid GRPXXX:
TSS ADD(SMACID) GROUP(GRPXXX)
Or, make the Default Group be OMVSGRP:
TSS REPLACE(SMACID) DFLTGRP(OMVSGRP).
At this time this acid is considered to have an incomplete OMVS Segment.