I found what was causing my troubles. When done with the boolean cut I was making a clone of the part that covers up the hole in the wing and joining it with the wing and the back of the flap ( Join Salected). After I quit doing that (as instructed by the Abacus instructions) I had no more problems with it. I left the parts as a single part and was able to complete the model and compile. Just thought I would let everyone know just in case you ever had the same trouble.