oh I see. I thought you meant the file format was not binary. Hmmm, not sure. Maybe Doug will have some insight, as I didn't think surf2surf would binarize by default Bruce On Fri, 13 Sep 2019, Matthieu VANHOUTTE wrote:

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Hi Bruce,

The input file has not only binary values (0 or 1) it is made of float values, whereas the output mri_surf2surf contains only binary values.

Best,

Matthieu

On 13/09/2019 15:52, Bruce Fischl wrote: Hi Matthieu

  sorry, I don't understand. All the files are binary, no? Are you
  getting an error?

  cheers
  Bruce
  On Fri, 13 Sep 2019, Matthieu VANHOUTTE wrote:

              External Email - Use Caution Dear FS's
        experts,

        I am trying to downsample some surface data from
        fsaverage to fsaverage6 with the following command:

         mri_surf2surf --hemi lh --srcsubject fsaverage
        --sval ./lh.fsaverage.s8mm.mgh  --trgsubject
        fsaverage6 --tval ./lh.fsaverage6.s8mm.mgh --cortex

        However, the output surface data is a binary file
        contrary to the source one (please see attached).

        Would anyone have an idea of the problem?

        Best,

        Matthieu

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Hi Doug,

In which version of FreeSurfer does this bug appear? And under what situation does this bug appear?

I swear I have used the command with similar flags, but did not experience this bug.

Thanks, Thomas

On Fri, Sep 13, 2019 at 10:58 PM Greve, Douglas N.,Ph.D. < DGREVE@mgh.harvard.edu> wrote:

This is a bug. I've fixed it in our development version. You can download an update from here https://gate.nmr.mgh.harvard.edu/safelinks/greve/mri_surf2surf

On 9/13/19 8:00 AM, Matthieu VANHOUTTE wrote:

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Dear FS's experts,

I am trying to downsample some surface data from fsaverage to fsaverage6 with the following command:

mri_surf2surf --hemi lh --srcsubject fsaverage --sval ./lh.fsaverage.s8mm.mgh --trgsubject fsaverage6 --tval ./lh.fsaverage6.s8mm.mgh --cortex

However, the output surface data is a binary file contrary to the source one (please see attached).

Would anyone have an idea of the problem?

Best,

Matthieu

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