I've been trying to puzzle this one out.
In my model I have stair stringers that cope into each other without any issues. In another view of the same model I can only see the cope in 'medium level detail'. The warning message I get is "Coping applied, but only in Medium Detail Level."
What could I have set/unset that now only allows coping at that detail level? When I go to the fine detail views the coping is there and looks correct. I can remove it, and recope without issue.
Thanks
Doug