I think you need to specify ‘--src_type curv’ and ‘--trg_type curv’ to read thickness files.

It looks like you passed ‘thickness’ to the wrong flag. Use ‘—srcsurfval’ and ‘—trgsurfval’ instead.

Here is wiki help page - https://surfer.nmr.mgh.harvard.edu/fswiki/mri_surf2surf

Best,

Yujing

From: freesurfer-bounces@nmr.mgh.harvard.edu <freesurfer-bounces@nmr.mgh.harvard.edu> On Behalf Of Sahil Bajaj
Sent: Wednesday, December 6, 2023 3:37 PM
To: Freesurfer support list <freesurfer@nmr.mgh.harvard.edu>
Subject: [Freesurfer] Faces and vertices error !

        External Email - Use Caution        

Hi FreeSurfer community,

I am trying to map subject-specific cortical thickness map to standard fsaverage space and I ran the following command where sub1_filled is my individual subject in native:

mri_surf2surf --srcsubject sub1_filled --srcsurfreg thickness --trgsubject fsaverage --trgsurfreg thickness --hemi lh --sval sub1/surf/lh.thickness --tval fsaverage/surf/lh.thickness

After I run the above command, I am getting the following output and error. I am not sure how to resolve this and whether there is something wrong with my command line or with the data. I would greatly appreciate any help.

Source registration surface changed to thickness

Target registration surface changed to thickness

7.4.1

setenv SUBJECTS_DIR /Users/sbajaj/FS_Projects/

cd /Users/sbajaj/FS_Projects

mri_surf2surf --srcsubject sub1_filled --srcsurfreg thickness --trgsubject fsav1 --trgsurfreg thickness --hemi lh --sval sub1/surf/lh.thickness --tval fsav1/surf/lh.thickness

sysname Darwin

hostname MDACM0CL9004107

machine x86_64

user sbajaj

srcsubject = sub1_filled

srcval = sub1/surf/lh.thickness

srctype =

trgsubject = fsav1

trgval = fsav1/surf/lh.thickness

trgtype =

srcsurfreg = thickness

trgsurfreg = thickness

srchemi = lh

trghemi = lh

frame = 0

fwhm-in = 0

fwhm-out = 0

label-src = (null)

label-trg = (null)

OKToRevFaceOrder = 1

UseDualHemi = 0

Reading source surface reg /Users/sbajaj/FS_Projects//sub1_filled/surf/lh.thickness

nquads=4456450, nvertices=341

error: ERROR: MRISread: file '/Users/sbajaj/FS_Projects//sub1_filled/surf/lh.thickness' has many more faces than vertices!

Probably trying to use a scalar data file as a surface!