I see the following messages and XCOM does not come up.
Application error. MCH3601 unmonitored by CAXC2TCP at statement 0000000010, instruction X'0000'. Function check. CEE9901 unmonitored by XCOMSRVR at statement *N, instruction X'0366'. Message CEE9901 in called program QLEAWI (C D F G).
This problem can occur after a full restore of CA XCOM. The user space was created by QSECOFR. The user who restarted XCOM TCP didn't have access to the user space created by QSECOFR.
Release: CA XCOM for i5/OS (AS/400)
Delete the user space TCP4M08044 and let the STRXCTCP command recreate it.