Quote Originally Posted by catymag View Post
Maps built by Mapsource in your pc have flag 0 in header and Basecamp looks for that flag and doesnt display them coz they should be already installed on pc in Mapsource.
The other way round, maps created by MapSource have Ms=1, that's why they are not shown in BaseCamp.

@GPSFranz
Yes with GMAptool you can change Ms flag. Activate Expert Options and then you find in register [Write] the line Version in Header, where you can set 0 in the box behind Ms.