I picked up a Montana 650T on the recent sale to replace my 76CSx, but have run into some major SNAFUs with routes. Setup: Firmware 4.50; Basecamp 4.x; CityNavigator NA 12.40 (SD card, enabled); TOPO 1K (internal, disabled); OpenStreetMap (SD card, disabled); BirdsEye Imagery (SD card, enabled). Routing is either Automotive or Motorcycle. I have a bunch of routes I created in the past within basecamp, and loaded those onto the Montana. In addition, I created two new routes in Basecamp -- one from scratch by hand on my PC, then another I converted from a Google Earth KML track on my Mac. Both the new tracks were made using the 2012.40 CNNA maps loaded on the GPS, and most of the old routes were made using the 2012.40 maps as well. Routes were transfered to the device using the standard Send To Device function, and stored in the Garmin's internal storage, not the SD card. I'm having three different issues. Firstly, all of my old routes displays properly while previewing on the Montana, but pops up an error saying it was routed on different maps, do I want to reroute after I hit GO. I hit yes, then I get an error stating that the maps contain no routable data for that area, even though it just did the routing during preview. This includes the ones that were made using the 2012.40 NA map loaded locally on the computer. Basically, none of my old routes work at all on the Montana. Secondly, the route created on my PC previews fine on the Montana, but when I go to route it only has me drive to the final waypoint with no routing at all. It displays "Drive to LastWaypoint" with no turn-by-turn at all, and the Last Waypoint is the only thing in the direction list some 20 miles away. Thirdly, the converted route on my Mac actually displays the correct route AND continues to display the correct route after I hit GO. However, it does not offer an option to navigate to the start of the route like my 76CSx. This is a bit of an issue since the starting point is over 70 miles away in a straight line and requires a good chunk of turns to get there. Routes created manually on the Montana itself seem to work fine, including directions to the start of the route. Basecamp loaded routes also lack the option to edit the route on the device like I could on my 76CSx. Any idea what's going on? EDIT: I've now noticed that after I get the "Map does not have routable roads in this area" error, the TOPO map automatically re-enables itself.