I recently changed from a ETrex Touch 35 to a GPSMAP 65s and moved my TOPO France V5 Pro map on micro SD (bought from Garmin) to the GPSMAP 65s.
The TOPO France map displays without problems on the GPSMAP 65s, but will not display in BaseCamp giving the error "An error occurred when attempting to use theTOPO France V5 Pro sud ouest map product".
I'm using BaseCamp with Windows 10.
I have several maps bought from Garmin pre-installed on micro SD - how can I make this work?