Hello all,
It seems to me that it might be helpful if @Align_Centers had an option (perhaps called "-close") to move DSET in voxel units instead of mm. This would prevent interpolating DSET and should get the 2 datasets close enough to one another (within 1 voxel) so that other AFNI programs don't complain.
Many thanks & kudos to the entire AFNI community,
Antonio