ERROR: MultiRegistration::loadMovables: images have different voxel sizes.
  Currently not supported, maybe first make conform?
  Debug info: size(1) = 1, 1, 1   size(0) = 1, 0.976562, 0.976562
error: No such file or directory
error: MultiRegistration::loadMovables: voxel size is different /home/dbermudez/Documents/subjects/00_0001/mri/orig/002.mgz.

However, I have checked the dimensions of both the T1w and the T2w and they both have the same dimensions: 176×256×256. I do not know what is the problem? and how can I fix the issue?