Since the customer had applied CCI PTF RO94761, the following DD statement needed to be added to the CCITCP and CCITCPGW procs:
//CFGOUT DD SYSOUT=*
The use of this DD was added with TLS 1.1 and 1.2 support for CCIxxx/CCIxxxGW. The CCISSL/CCISSLGW procs were updated to include it, but the CCITCP and CCITCPGW procs were not redelivered with the update.