Have you tried FID 800 Maps like modified CityXplorer 2014.1 ?
Maybe a similar technique could be used ?? Like changing the FID, Internal Name etc
The difference between stupidity and genius is that genius has its limits.
@Caty try with this pack and let me know result.
Extract rar beside CN map, if you have CN with name gmapsupp then just rename gmapprom unl and gma to gmapsupp gma and unl.
@Loly same result: Cant authenticate maps.
Some problems with OSM maps and other topos:
In a Dutch forum it's reported that the problem is there(also) with the new European map from Openfietsmap (Openstreetmap), that map has the MAPID:10140
Here there is no gma-file in question.
So Garmin has made a mistake with this new firmware upgrade, or it is the beginning of a further security methodology
Nüvi 2595 / 60CSx / 62s / Oregon 600
just visit the Dutch forum, new post: also a legal version of CN 2014.40 gives the same problem if I can believe TS.