I have another question from a different directive which is producing an error now.

This line

datetimepicker.data("DateTimePicker").setDate...

says: TypeError: Cannot read property 'setDate' of undefined

and I can see that datetimepicker.data("DateTimePicker") returns undefined although datetimepicker is initialized and has data method.

So, what is this new error about and what can I do now?