Hi Colm,
Those errors are coming from a transformation from the NIfTI data
format to the AFNI format. Your data seems to be oblique, or has
been transformed by some non-AFNI program.
In any case, the AFNI format for datasets only allows orientations
where the axes are parallel to the principle axes. When that is
not the case, such as here, it chooses the closest orientation.
In this case, the 'worst' axis is off by 11 degrees.
What data is this, anatomical, EPI, statistical, or something else?
- rick
