I have a ComboBox (CB) residing in a FormField that works just fine. I wanted to convert it to the MultiColumnComboBox (MCCB) to show a couple of extra fields. I don't have time today, maybe over the weekend, to create a small, self contained example. Yet, here are the two similar sections and their results:
MCCB Without ngDefaultControl
As you can see I added the ngDefaultControl to the control after getting the following error on the MCCB without it:
Anything obvious to someone?