Experienced 276C user here. Had to re-boot my 276C. Running City Navigator 2015 NT 2015.10; same software as before. Waypoints and routes re-loaded easily. Selected map set captured and reloaded (apparently) correctly over nine minutes. All good so far. However, selected maps do not show in the Map Information screen, and are not available to the unit. Database Error shows in the Message / Log screen. Must be missing something simple, but your suggestions will be appreciated. Thank you, Jason