Hi Ray, is there any news on the 64 bit migration? I'm using Leveller quite a lot in my new workflow for ME-DEM and I'm hitting a wall on how large a file I can use. I need to be able to get 10K in there, but I can't at the moment. We're about to do a big run on the map. For anyone interested you can read about it here http://www.outerra.com/forum/index.php?topic=326.30 Cheers, Carl