Attempting to run iPad app quits debug

So I’m working on an app that works fine when running as an iPhone in the simulator. I’ve copied my code and views from a previous app and setup a split iPad screen to get that working. When I run the app as an iPad, the simulator loads the app, but never launches it. Then Xojo drops out of debug as if I hit the Stop button, with no errors. Any ideas of what I should look for to resolve this?

Never mind. The simulator log pointed me to a bad layout constraint which solved the problem.