Quote Originally Posted by Swall View Post
Actually, in order to get the map working, all I have to do is to place that .gma file next to gmapsupp.img in the ext. storage media. There are no other related files like .unl, etc. The .gma file missing results in auth error so the map is indeed protected. And that .gma file is the sole mean to unlock the map. I've no idea if that's right or wrong but it in my case it works in that manner.
The file with "unl" extension is just an only usual text file. Garmin device read it and content of the file be saved in non-volume memory. So until you will reset device there is no longer needed in this file. Did you use a unlock file with new FID sometime?
As another option there are unlock code in img file. It may be distributed by vendor with ready for use file or with mapset for mapsource.
We do not know anything about your map vendor...