I created a Custom type "MyType". and make a one-many relation in "Category" and "MyType". For a particular user group, in product-cockpit, I need to make Category read-only and only that attribute of "MyType" changeable . But as if I apply rule "change -> false" on Category type and change->true on myType, still I am not able to change the vale for myType. My attribute specific permission are not working.