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Hello Freesurfer developers,

I ran recon-all command to extract all subjects stats. Here I'm mainly targetting the surface area, volume, thickness and mean curve for all subjects. 

" recon-all -i /filepath/file/ -s /subjectid/ -all " this was the command i used. 

Now the problem is that I'm getting zeroes for the surface area which is parcellated from 'aparc.a2009s' and it occurred for a large number of subjects. 
The command for converting stats to .txt is given below:

aparcstats2table --hemi lh --subjects 004 008 --parc aparc.a2009s --meas area --tablefile lh.a2009s.area.txt


l
h_G&S_frontomargin_area

lh_G&S_occipital_inf_area
lh_G&S_paracentral_area
lh_G&S_subcentral_area
lh_G&S_transv_frontopol_area
lh_G&S_cingulAnt_area

I wanted to know the reason for getting these zeroes. Could anyone plz help me out in this regard.

Thanks in advance!

Best
Vittal