Tower trigger again -1 reply

I am still looking for the trigger which will enable me to make it so that if a player places a lure then it will turn into a tower... I tried making it so that the condition is player unit count/lure/1, and the effect is army change type/(the army i made for the lure)/tower I tried it but I guess it didnt work because i deleted the army of lures I made..I dont know ANY IDEAS DAMNIT!? IM SO FRUSTRATED!!!

Change unit in area, from: animal atractor(or something like that) to w/e you wantit to be :)

Also put animal atractor(or something like that) as the object in player unit count

Unfortunately there is no trigger called change unit in area

Do you use TT or vanilla?