FIX THIS ERROR: NO DETAILED MAPS FOUND THAT SUPPORT ROUTING. THE NUVI CANNOT BE USED WITHOUT THEM
If your GPS displays that message is that you replaced the original map of your gps with the map that has not been unlocked. You'll need an unlock code. After purchasing a new code or obtained a code from the customer service yo (25 characters), you create a file called gmapprom.unl in the Garmin with your unlock code if your primary card is gmapprom.img. If it is to unlock an additional card gmapsupp, you create the file gmapsupp.unl. After the first boot, the maps will unlock and you can now use your gps unit.