Z3 exporting issue, I think?

Im having an issue with Z3 I think. I have been working with a car model. Ive never had an issue with it. All of a sudden it wont spawn in game. I get a message "game error please restart game". I have exported the model several times, I have removed all of the addon parts, I deleted the base model and imported it again from a fresh file, nothing has worked. I think there is an issue with Z3 exporting the file but im not sure.