Hi Bruce,
Thank you very much for your help but it still don't work.
mris_register s000_open_brain_sanlm_+TIR_normlalized/surf/lh.sphere avg_all_subjects_SD/lh.reg.template.tif lh.sphere_reg
$Id: mris_register.c,v 1.59 2011/03/02 00:04:33 nicks Exp $
$Id: mrisurf.c,v 1.693.2.2 2011/04/27 19:21:05 nicks Exp $
reading surface from s000_open_brain_sanlm_+TIR_normlalized/surf/lh.sphere...
MRISread(s000_open_brain_sanlm_+TIR_normlalized/surf/lh.sphere): could not open file
No such file or directory
mris_register: could not read surface file s000_open_brain_sanlm_+TIR_normlalized/surf/lh.sphere
No such file or directory
note that the file exist in the folder and i have changed the SUBJECT_DIR to the appropriate folder