Your App Has Stopped

Hi, testing out an app on older versions of the SDK. It’s targeted for 16 or later and I’ve been testing on 26 up to now and all is fine. Went back to 19 (as I now have a tablet running 19) and the app fails to start, either on the tablet or in the simulator, with the “Unfortunately your app has stopped” message.

I’m not sure whether this is even entering my code as there’s nothing output in the log. Any ideas about how to debug this error? thx

Seems to have sorted itself out with a complete rebuild. thx