When trying to run CCITCP in a TCPACCESS environment it can't find the IP stack. These messages appear:
CAS9899W - TCP/IP Not Available...waiting 000:U1ASSA ERRNO = 10102, RC = -001 INITAPI 000:U1ASSA Interface could not find the first subsystem. 000:U1ASSA TCP/IP Not Available...waiting 0000
In an environment configured only with CA-TCPAccess then the CCITCP and CCITCPGW executing CAS9ATGS/CAS9ATPS may not detect a TCP/IP environment. You will see the CAS9899W - TCP/IP Not Available message even if the IP stack is active.
Apply APAR QO87831 to resolve this problem.