I'm guessing I may not be the only one but here goes. I recently uploaded new maps on my Garmin Nuvi58. All seemed to go well. Garmin Express says the maps are there. However, when I turn on my Nuvi58 I'm greeted by "Detailed maps are required for routing. No detailed maps found on this device", Screen then changes to "Cannot unlock maps". If I look in the Garmin folder on the Nuvi it just has a link to the folllowing: C:/Users/wingreen/AppData/Local/Microsoft/Windows/INetCache/IE/8RY1KWP9/GarminDevice[1].xml.
I tried Garmin support but they were hopeless and just suggested I try re-loading the maps via Garmin Express. Same problem. So Garmin said they could sell me a new one! Now, its POSSIBLE, I disconnected the Nuvi too early (not sure). I've had the Nuvi for years and never had a problem with uploading and using new maps before. Any ideas? Is it a corrupt code or something? If so, is there a fix? Any ideas to resolve would be much appreciated.