The startup of the XNET STC fails to initialize due to error:
xntTCP011I TCP/IP HPNS INITAPI complete - retcode(-1) errno(156)
This type of INITAPI failure: retcode(-1) errno(156) can be caused by the UID associated with the XNET STC not having an OMVS segment or home directory
defined. If it does have an OMVS segment and home directory defined, but is not defined as UID(0), the MAXPROCUSER setting in the BPXPRMxx
member has reached its limitation on the number of processes that a single user (that is, with the same UID) can have concurrently active.
The resolution was to define the userID associated with the XNET STC as UID(0) for a UID (0) is not limited by the MAXPROCUSER value.