Hello AFNI experts,

Apologies if this is a repeat question. I did do a search of the message board and found no relevant results.

When using align_epi_anat.py, I tried specifying for -epi_base the option, mean. Here's my actual command:

align_epi_anat.py -anat MPRAGE_sag_CM+orig -epi sw3_CM+orig -anat2epi -giant_move -cost lpc+ -epi_base mean -child_epi sw1_CM+orig sw2_CM+orig sw4_CM+orig sw5_CM+orig sw6_CM+orig -tshift_opts "-ignore $tignore" -output_dir $datadir/$subj/func -save_vr -suffix _al -overwrite

And here's the error it returned:
** ERROR: selector syntax error 5 'mean]'
** ERROR: bad sub-brick selector [mean]
** FATAL ERROR: Couldn't open -base dataset ./sw3_CM+orig[mean]

Am I just misunderstanding this option? I assumed it would calculate the mean when specified. Is that not what it does, or am I just using it wrong?

Best,
Will