Hi, I think that last version of BaseCamp uses nearly exclusively class 4 roads for long routes in car mode. This is similar change like Garmni did for routing in nuvi models form 2012. Falager from Garmin has confirmed here: https://forums.garmin.com/showthread.php?43441-Bad-quality-of-routing-in-Bas... If class 4 network is not continuous, then routing will fail. I have made some maps for Poland, that should work in BaseCamp. The main changes to default style is that I added motorway_links, trunk_links and trunk roundabouts to class 4. For Poland I had to add selected primary and primary_links too, but this is specific the country without continuous network of highways. I haven't noticed any problems with tiling. My map is here, you can test it: http://www.gmaptool.eu/en/content/poland-osm-auto -- Best regards, popej