Thread: Garmin City Navigator North America NT 2014.20

Originally Posted by Neil

MapSource is no longer supported by Garmin and is not recommended for creating CNNT images, particularly large ones. The recommended programs to use are BaseCamp & MapInstall.

I guess i havne't been reading enough of the forums. Is there a general rule for the size before there might be problems in the img and what kinds of problems? The images i make are generally 2-4 Gigs. I havne't noticed anything unusual other than the same problems i've seen with their maps for many years..

Originally Posted by Neil

@Skylinestar
Although a very nice and user-friendly program to use, MapSource is no longer supported by Garmin and is not recommended for creating CNNT images, particularly large ones. The recommended programs to use are BaseCamp & MapInstall. MS compiles img files somewhat differently and because it may create tiny errors in the resultant image, it's just not suitable to use with modern map files. Go to the [Only registered and activated users can see links. ] and you'll find plenty of links to help you, even with MS.

I have unlocked the map. In Mapsource Manage Map Products, the map is now shown as "Not Lockable".
I managed to create the gmapsupp.img using mapsource and load it to my SD card and fit it into my Garmin Nuvi 255W. Upon Nuvi startup, I got the message "Can't Unlock Maps" Is the img file locked or unlocked?