I obtained the curv vector and used read_surf.m to get the face lists in lh.inflated for fsaverage. If the faces list was generated as a 327680x3 double, would it be correct to say that the number of faces is 327680 as the input argument for write_curv.m?

Thanks so much for your help,

JeeSu
-- 

Date: Thu, 4 Jul 2019 12:56:57 -0400 (EDT)
From: Bruce Fischl <fischl@nmr.mgh.harvard.edu>
Subject: Re: [Freesurfer] Error in mris_convert thickness file from
        ascii format
To: Freesurfer support list <freesurfer@nmr.mgh.harvard.edu>
Message-ID:
        <alpine.LRH.2.20.1907041253020.916@door.nmr.mgh.harvard.edu>
Content-Type: text/plain; charset="utf-8"

Hi JeeSu

which surface you use is irrelevant (we only need one with the right 
topology).

As for converting from ascii back to curv, matlab is probably the easist 
using read_ascii_curv.m and write_curv.m. You will need to also read in a 
surface to get the number of faces. Again, any one of the same topology 
ones should be fine (e.g. lh.inflated for lh.thickness.asc)

cheers
Bruce