I have downloaded the New Style map of Switzerland (CHE) in to BaseCamp on a Windows 10 HP Laptop.
In BaseCamp it all looks fine.
When I use MapInstall to transfer it on to my Garmin Montana 600, only a basic version of the map is installed (more like a base map).
Instead of the GPS receiving the 221 Mbyte map, I only get about 11 Mbytes with no detail and most searching giving no results.
I have tried this 6 times and also tried with the “old” Style mapping. Both give the same problem.
This problem has never occurred in the past. I wondered if Garmin are now blocking Third Party maps.
I am taking 15 members of a Walking Group to Switzerland next week, so any help would be most appreciated.