Setup of CCITCP and/or CCITCPGW tasks requires a valid OMVS segment be defined to the assigned userid. Failure to have a valid OMVS segment defined may result in the following condition:
CAS9891E - External Security Error
What are the minimum requirements for OMVS segment?
Minimum requirements for OMVS Home program and directory are:
Home can be anything valid, ROOT would be fine: HOME(/).
The standard OMVSPGM is /bin/sh.
UID can be anything you wish.
Sites will generally define the OMVS USER PROFILE with:
HOME(/) OMVSPGM(/bin/sh) UID(x)