I am in a fair sized assembly trying to mate some hardware and I have a reoccurring problem. I have found if I select a face and hold ctrl while selecting the second face or feature it allows me to create a mate. However, if the mate will cause problems the only options I have are to force the mate or not. I thought hitting Esc. would back me out of the mate but it does not. The only thing I have found is to go ahead and create the mate and then find the mate in the tree or the bread crumbs and delete it. Is there a quick way to cancel the mate? There sure should be.