Crown molding and Open To Below.

[Treehouse2339]

I have a living room and in one corner an open to below from the floor above.  When I apply crown molding to the walls of the living room it continues through the opening.  Is there a way to stop the crown short of the opening and 45 the end into the wall?

[tommy1]

In these situations, I normally do a molding polyline (manually) and place a break where I want it to return and then move the end into the wall to create the return.