Help in finding ExceptionError

[deanhystad]

You get an exception if this gets executed but no exception if not:

        ingredients_entry.configure(yscrollcommand=ttk.Scrollbar.set)

Sorry for the class red herring. After looking at all you code I see this is a reoccurring pattern. Now how I use classes, but don't use me as a python code barometer or you are in for stormy weather.