Hi guys,
Looking for a little help. I have a echomap 70dv and when I try to insert a Trakmap marine card I get a "map format not supported" but when I try it on another unit of the same model (echomap 70dv) it works fine... both units running the same firmware version so I'm a little confused. any ideas?

Ps: If I try a different card "bluechart" it works of both.

Are the map files themselves a different format? both image files are named gmapsupp.img so I'm not sure whats happening.