Objective: Restrict Items which are part of an item Group. Scenario: For business reasons, some items which are part of a bundle cannot be sold except through an Item Group. So, If I add service A which is part of an Item Group, NetSuite either blocks me from adding the line or saving the transaction. Possible solutions: Use item filter on forms to recognize those items and block them - problem is that search feature doesnt appear on item sublist field. Use scripting - (Worst case solution) Can someone suggest another approach ? Thank you

Do you want a user to not be able to select an item from a kit and which therefore must not be sold alone?

exact. not kit but item group

why don't you use a saved search that you assign to a custom form so that the user can only see the items in this saved search when creating a transaction?

Adding an item filter on form will r3move the search mechanism when selecting item. This is the problem