[Freesurfer] lh.thickness error

Hi all,

I was doing mri_vol2surf to overlay functional average(FSL) onto anatomical average (Freesurfer) and got the following error message,

ERROR: .................. Reading thickness /home/nam/V4RET/average/surf/lh.thickness MRISreadCurvature: could not open /home/nam/V4RET/average/surf/lh.thickness No such file or directory ..................

Is "make_average_subject" supposed to produce "lh.thickness"? Please let me know what is wrong?

Thanks,

Nam.

My command was: mri_vol2surf --src /home/nam/V4RET/FUNC/AVG/LMhori.gfeat/cope1.feat/thresh_zstat1.img --src_type analyze --srcreg register.dat --hemi lh --projfrac 0.5 --out /home/nam/V4RET/FUNC/AVG/LMhori.gfeat/cope1.feat/thresh_zstat1-lh.w --out_type paint