iOs Crash

I have a Menu View that opens a number of different views each accessing and loading a unique sql data base from the Open Event. Each view then has a button to return to the menu view or a view that is appropriate to the task being performed. After a certain number of view changes, the app crashes with:

CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION + 24

I have tried all manner of fixes and workarounds but the fix eludes me. Doesn’t matter if I use

Dim mynewView as New MainStatusView11 App.CurrentScreen.Content=mynewView

or the pushto method.

Of course all works fine in the simulator so I suspect it’s a memory issue and watchdog shutdown.