Why does Omegamon II fail when VTAM is stopped?
Omegamon II was running.
The z/OS operator did this command: Z NET,CANCEL
As a consequence the Omegamon II process failed with an S0A7 abend.
The Omegamon process is not prepared to handle this circumstance and so it fails.
If VTAM needs to be stopped, then Omegamon II and other ITM processes running on z/OS should be stopped first.