I have a script that will update a field in a sub-form here:

Contacts_subform.Event_Role = "Venue Contact"; //(this works)

However this method will remove all other options and only add this option. I want to be able to add a selection with select() and remove just one option with 'deselect()'. by using this:

Contacts_subform.Event_Role.select("Venue Contact");  //(this does not work)

Unfortunately I get the following error:

'Event_Role' does not exist in this form.