afni.nimh.nih.gov

Many of those datasets had invalid NIFTI headers. So
worse than them being far enough off to require -giant_move
or maybe @Align_Centers, some might even be viewed as
left/right flipped.

So if alignment fails again, consider running @Align_Centers
on each dataset with the template as the -base dataset.

Also, consider expanding Peter's option to include a test
for being left/right flipped:

-align_opts_aea -giant_move -check_flip

- rick