Our route server is returning this error "Unable to complete operation: Cannot do 3D operations on curved segments" when you try to process a route. Many routes work great but there is are a few areas of the map that cause this issue. We have a custom map and route service. The guy who manages the server does not seem to know what this error is so I am hoping someone here does :-) Any help is greatly appreciated! If you need more details please let me know.