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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!
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