Hi Rick,
Thank you for the pointer. I tried the -float and now there's no warning messages any more. Could you tell me a little bit about what a misfit error is? My data has been normalized voxel-wise to have a mean of 1, so the actual numbers are like 1.002 0.992 etc. Is this expected behavior? and should the -float option take care of this? (I assume it does given there's no warning messages, but I want to make sure).
Thank you,
-ts