Ok just figured it out. Kinda, at least. It has something to do with also duplicating the weapon or effect file. It wont link/work properly if these boxes aren't checked in the duplication process.
Ok so the units will now attack one another but now theres a new problem, the units have no sound effects. Marine lacks gunfire sound effects and zerglings lack the claws sound effect.
Everything was copied perfectly. Box for Box down the line. This is a very frustrating problem as i dont see why a copied unit wouldnt attack but the original unit attacks just fine.
Here is my problem, I want to make a custom infested marine unit. I go to data editor>duplicate inefested marine>. Heres where the problem comes in, I place duplicated infested marine units on map (controlled by player 15 (Hostile)) and place my marine on map (controlled by Player 1) none of the...