rebooting the computer did solve this problem, and I was able to run through afni_proc.py for one subject. Now, I am seeing this error, and I don't know how to deal with it:
#++ removing skull or area outside brain
#Script is running (command trimmed):
3dSkullStrip -orig_vol -input ./__tt_pb01.302a.r04.tshift_ts_rs+orig -prefix ./__tt_pb01.302a.r04.tshift_ts_rs_ns
**ERROR: normalization fails!?
** ERROR: Could not strip skull
** ERROR - script failed
@auto_tlrc -base TT_N27+tlrc -input 302a_anat_strip+orig -no_ss -suffix NONE
Thank you again!