I created a "trek" route (On OS maps, and imported into Basecamp - copied to Etrex. When trying to follow the route the map is not visiible, only a white screen shows. To resolve I had to: a. delete ALL nearby routes b. Delete All nearby Waypoints. Only after this did the map show. So, I have no chance to see a route over laying the map. Maps are paid for high detail ones. (UK local sections). Question; Is there something else to do to have off road routes visible together with a map? Its not much use without the map.