whilst busy working on fairly complicated model and using in-context modelling. CREO is good enough to inform you when you have mistakenly created a circular reference but gives no idea as to where it is. it may only be 1 constraint that is causing it. it would be great and very time saving if CREO could, as well point out the circular ref , point to the feature or constraint that is cause it. this could be done with the yellow triangle in the tree and a note in the info area.