How Negative test

I’m trying to see if I can get a message in “Pending” state or stuck so I can see it in CC (Command Central) and delete it. What I’ve done is for a “EXIT” failure in my subscriber service but I don’t see the message in “Pending” or to where I can manually delete it from CC. If I switch to Broker, then I can see it “Unack” and delete it. Not so much when it comes to UM. Any ideas?

I figured it out. The property of the trigger needs to be set to “Suspend on error = True”.