I have been drawing storm pipe no problem all day then all of the sudden my AutoCAD MEP 2015 decided that it does not know what piping preferences to use so it brings up a window, "Choose a Part" with the description, "The part specified in the routing preference cannot be used in the layout due to size or angle limitations. Please select a different part to substitute in the layout and click OK."
I did try changing the profiles and I attempted to use MEP 2014 also... no luck either way.
I do not understand why this would come up because it was fine all day and just started... Please help!!!!