Thread: City Navigator Europe NT 2015.20

Originally Posted by Neil

@any06
If you have *.unl/*.gma files on the 50 from an earlier map version then back them up and delete them off the unit.

There is a *.gma in /.system
After backup, deleted. Startup message changed to cannot authenticate map, still not appearing in MyMap

Originally Posted by any06

There is a *.gma in /.system
After backup, deleted. Startup message changed to cannot authenticate map, still not appearing in MyMap

I suspect the *.gma file is related to another map on your device, not the CNE NT 2015.20 map you're trying now. After all, there is a Lifetime Mapupdate subscription linked to your nüvi 50LM. If that is the European map, there's no need to get any unlocked UK map working on the device. Further, your nüvi 50LM would need the NTU version of the European map, not the NT version. JCV for instance would not work.

Basically, if the downloaded unlocked UK map works fine on the nüvi 765, it should be recognised on the nüvi 50LM too.

Originally Posted by smokefree

I suspect the *.gma file is related to another map on your device, not the CNE NT 2015.20 map you're trying now. After all, there is a Lifetime Mapupdate subscription linked to your nüvi 50LM. If that is the European map, there's no need to get any unlocked UK map working on the device. Further, your nüvi 50LM would need the NTU version of the European map, not the NT version. JCV for instance would not work.

Basically, if the downloaded unlocked UK map works fine on the nüvi 765, it should be recognised on the nüvi 50LM too.

Sorry the LM is not for Europe...
The gma is for another map in unit which I renamed and replaced with the this map.
On SD, I inserted later both NT and NTU maps, but none appeared

Tried a OSM map on SD, works fine.