Make Warehouse Mandatory Using FP on Quick Order Organizer Form

Hi Team

I am trying to make Warehouse Mandatory Using Form Personalizatin on Quick Order Organizer Form.

I have made it required using REQUIRED Property, it appears as Yellow but the form allows to continue search even without passing the Warehouse.

To accommodate it further, I have inclueded ITEM_IS_VALID property to False and it works fine but gives a message like 'Error is processing Lines' .

Is there any other approach or workaround that can be applied to make this work as soon as user Clicks on 'Find' button, message can be popped up saying ' Warehouse is mandatory' or similar meaningful message.