Hi
seems an unmatched “end group” at the end of a form can also cause this “pop from empty list” error message.
I have just spent the best part of an hour trying to find a problem with lists and select_one questions when the problem turned out to be an “end group” well down the page I’d failed to delete - I’d used another form to start a new one and missed one line when clearing the information I didn’t need.
hopefully saves someone else some pain!
