Thanks, this solve part of the original goal.
Now i’m trying to do a more small node to get the array, my first post is not well focused, is much more difficult than what is realy needed.
Now the “class to class object reference” is done with the native node “Construct Object from Class”, and connect “class object reference out pin” to “class object reference in pin” of our node.
Also change “UEnum DropDownList” of variable categories, to just “String entry pin” for type the target variable category name.
I need help to create the “class object reference entry pin”, is possible to do it from user project ? I prefer not edit UE4 code, unless is absolutely necessary, to make upgrades to new UE versions more easy, thanks.