ACF2 compatibility fixes required for the upgrade to z/OS 2.40 include SO14735.
++PTF (SO14735)
/************************************************************
ACF00MLS+280 S0D3 ABEND AFTER SO13143 WITH MLS ACTIVE
PROBLEM DESCRIPTION:
After installation of PTF SO13143 an abend S0D3 may occur in
module ACF00MLS+280 when a PTKTDATA SSKEY record is deleted.
The problem is limited to sites that run with MLS active.
MLS is Multilevel Security, and is a feature of ACF2.
How can it be determined if MLS is active with ACF2 ?
If MLS is inactive, is the fix required?
Release : 16.0
The z/OS Compatibility Matrix directs the viewer to this entry for ACF2:
Fix Category: CA.TargetSystem-RequiredService.z/OS.V2R4
The status of MLS is shown by entering these commands at the TSO , ACF prompt:
READY
acf
ACF
show mls status
-- Multilevel Security (MLS) Facility --
MLS Status: INACTIVE
MLS Mode: *NONE*
Write-Down: *NONE*
Current SYSID: XA01
ACF
Regardless of the status of MLS you are required to install SO14735 for ACF2 support of z/OS 2.40.