Thread: Nuvi 58LMT "can't unlock maps".

OK rearranged the SD card and I get the same error. If I don't have the SD card inserted no error.

The D4* files look like they're the FourSquare database. If I click on the "FourSquare" icon in Apps it displays various entries with the SD card inserted but nothing without it. So it seems it is unlocking that fine just not the main map.

I uploaded a garmindevice.xml file. That's a freshly created one. I deleted the original (but backed it up) so it could recreate it in case that helped.

Update. There's a file 844474241.gma in the .System folder with a 2016 date on it. If I delete that the error message changes to "cannot authenticate maps". I've put that file back and now get "cannot unlock maps" again.