new osm generic gmapsupp crashes my garmin Oregon700

I downloaded a standard osm generic gmapsupp of Portugal. Either the single image or a map installed on and send by Basecamp results in a crash.
In Basecamp itself there seems to be no problem with the map, it just works fine.

Can the crash be caused by the Orgeon’s new firmware 4.00 ?

After a downgrade to firmware version 3.90 everything works properly…