Frank,
I solved those issues with specifying all the tiles now (100100*.img and 10101*.img) and ----lastcolstd,
thanks! I still can't generate a map for the garmin device in Mapsource but I guess this issue has not been solved, right?
Hmm sounds too complicated. I'm generating the DEM data again, I made a mistake in my settings, specifying only 100100*.* tiles but I also have 10101*.* tiles, this explains those missing DEM in a lot of tiles 😊 I'm trying now the ----lastcolstd and see of it works.