How to make a EpicCombo Field in Part Maintenace Greyed out untill a part is selected

Hello,

I added a new field to our Part Maintenance screen, But when you load the menu, the epicombo field is active before selecting a part, how do I make it inactive until a part is selected?

Have you set it’s epiBinding?

It should be in the EpiCombo section when you are customizing. The field RetrieveOnActivate set to true.