Using IBM MFA to to logon using an PIV/ CAC MFA token.
TSS9999E CA-TSS SECURITY SVC ABEND S0C4 IN TSSRSVCS+166C
Release : 16.0
Component : Top Secret for z/OS
The abend is a s0c4 in tsskrout+22a, apply
LU02803 - ABEND S0C4 IN TSSKROUT+2AA INVALID @ACEE IBM