Hmmm I'm a bit lost with this topo. I installed it correctly and I can use it very fine in basecamp 3.3.2. Now I did try to make a partial img by selecting a couple of tiles with Mapinstall and install them on a (virtual) SD. Everything went fine, img was created. But basecamp doesn't see the created image, so I thought maybe mapinstall locked the tiles again. so I ran the UNL tool (version 7.1.6.) on the img. Still no result. Did I use the right tool for unlocking the tiles in the created partial img of this newer 2012 map?