you need to tell it what format to write the output in. Try using -
--tfmt curv

I would have thought you needed --sfmt curv also. I'm just guessing though. 
Doug is the expert on this.

cheers,
Bruce


On Tue, 4 Aug 2009, Feng-Xian Yan wrote:

> Hi,
>
>   I had asked two problems before; one is what is coordinates when I
> type mris_convert
> -c lh.thickness lh.white lh.thickness.asc, and another is if the asc file
> doesn't use Tal coordinate, what commands do I type to obtain the thickness
> asc with Tal coordinate?, and then you responded me with ?the coordinates
> are native RAS. You can use mri_surf2surf to convert the surface to tal
> coords with the talairach.xfm.?
>
>
>
> So, first, I change the native RAS cooridinate to Tal coordinate with
> ?mri_surf2surf --srcsubject noise0.5_0 --srcsurfval thickness --trgsubject
> noise0.5_0 --trgsurfval noise0.5_0_tal.xfm --hemi lh --sval-tal-xyz orig
> --tval-xyz?
>
> srcsubject = noise0.5_0
> srcval     = thickness
> srctype    =
> trgsubject = noise0.5_0
> trgval     = noise0.5_0_tal.xfm
> trgtype    =
> surfreg    = sphere.reg
> srchemi    = lh
> trghemi    = lh
> frame      = 0
> fwhm-in    = 0
> fwhm-out   = 0
> Reading source surface reg
> /usr/local/freesurfer/subjects/analysis/noise_analysis//noise_0.5_1_5//noise0.5_0/surf/lh.sphere.reg
> Loading source data
> Reading surface file
> /usr/local/freesurfer/subjects/analysis/noise_analysis//noise_0.5_1_5//noise0.5_0/surf/lh.orig
> Applying MNI305 talairach transform
> 0.966   0.002  -0.004   0.426;
> 0.018   0.989   0.041  -19.382;
> -0.006   0.032   0.962   17.438;
> 0.000   0.000   0.000   1.000;
> INFO: surfcluster: NOT fixing group surface area
> INFO: trgsubject = srcsubject
> Saving target data
>
>
>
> Then, I obtain the thickness asc file with Tal coordinate using this command
> ?mris_convert -c lh.noise0.5_0_tal.xfm lh.white lh.thickness.asc?
>
>
>
> But, this has an error:
>
> MRISreadBinaryCurvature: incompatible vertex number in file
> ./lh.noise0.5_0_tal.xfm
>
>
> What?s wrong? Would you tell me how to resolve?
>
>
>
> Thank you in advance!
>
>
>
> Feng-Xian
>
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