Why do I get "Invalid Object Name Classes" with the Picker

If you get the exception "Invalid Object Name 'Classes'" when using the mmPicker control, it's probably because you have set the control's PickListForm property rather than its PickListFormCaption property.

The PickListFormCaption property specifies the caption of the picklist form. The PickListForm property allows you to specify the class name of a custom form you want launched from the picker, and it uses the MM .NET generic factory to instantiate the form. This factory requires the existence of the Classes table in your database. For details, check out the topic Working with the Picklist Controls.