I just realized I needed lh.inflated in the command. I think it works now. 
Thank you for all the help!

Idil
________________________________________
From: freesurfer-boun...@nmr.mgh.harvard.edu 
[freesurfer-boun...@nmr.mgh.harvard.edu] on behalf of Douglas N Greve 
[gr...@nmr.mgh.harvard.edu]
Sent: Tuesday, July 25, 2017 11:00 PM
To: freesurfer@nmr.mgh.harvard.edu
Subject: Re: [Freesurfer] Segmentation Violation problem in surface files

what is your command line?


On 07/25/2017 03:52 PM, Yagmur Ozdemir 19 wrote:
> When I do either of the conversions with mris_convert, the system gives 
> freadFloat: fread failed / No such file or directory then a Segmentation 
> fault error.
>
> Best,
> Idil
> ________________________________________
> From: freesurfer-boun...@nmr.mgh.harvard.edu 
> [freesurfer-boun...@nmr.mgh.harvard.edu] on behalf of Bruce Fischl 
> [fis...@nmr.mgh.harvard.edu]
> Sent: Tuesday, July 25, 2017 10:21 PM
> To: Freesurfer support list
> Subject: Re: [Freesurfer] Segmentation Violation problem in surface files
>
> you can convert the overlays directly to nifti, but they aren't surfaces
> - they are scalar fields over the surface  (that is, they are one
> value/location with no neighborhood info). Not sure what Brainvoyager
> supports, but you could convert the surfaces to gifti
>
> cheers
> Bruce
>
>
> On
> Tue, 25 Jul 2017, Yagmur Ozdemir 19 wrote:
>
>> I am trying to export the overlays in .mgz format to Brainvoyager which 
>> recognizes nifti or its native .vmr format. However the mri_convert command 
>> gives error when I try to convert the templates. I thought if I could save 
>> the overlays directly onto the inflated surface files I could convert then 
>> visualize them in Brainvoyager, but couldn't figure that out so far. Thank 
>> you for the help!
>>
>> Idil
>> ________________________________________
>> From: freesurfer-boun...@nmr.mgh.harvard.edu 
>> [freesurfer-boun...@nmr.mgh.harvard.edu] on behalf of Bruce Fischl 
>> [fis...@nmr.mgh.harvard.edu]
>> Sent: Tuesday, July 25, 2017 7:47 PM
>> To: Freesurfer support list
>> Subject: Re: [Freesurfer] Segmentation Violation problem in surface files
>>
>> Hi Idil
>>
>> I'm not sure what you mean. If you give us a better idea of your overall
>> goal we can give you more helpful answers I expect
>> Bruce
>> On Tue, 25 Jul 2017,
>> Yagmur Ozdemir 19 wrote:
>>
>>> Bruce,
>>>
>>> Thank you so much for the help! I guess then the way to export these 
>>> overlays to other softwares is writing them on the subject's inflated 
>>> surface file.
>>>
>>> Best,
>>> Idil
>>> ________________________________________
>>> From: freesurfer-boun...@nmr.mgh.harvard.edu 
>>> [freesurfer-boun...@nmr.mgh.harvard.edu] on behalf of Bruce Fischl 
>>> [fis...@nmr.mgh.harvard.edu]
>>> Sent: Monday, July 24, 2017 10:36 PM
>>> To: Freesurfer support list
>>> Subject: Re: [Freesurfer] Segmentation Violation problem in surface files
>>>
>>> Hi Idil,
>>>
>>> we only store surface overlays in .mgz not surfaces themselves. Try loading
>>> a surface (like lh.inflated) then load whatever you were looking at as an
>>> overlay on the surface
>>> cheers
>>> Bruce
>>>   On Mon, 24 Jul 2017, Yagmur Ozdemir 19 wrote:
>>>
>>>> Hello freesurfer experts,
>>>>
>>>> I am trying to use an occipital lobe template adapted to my data as several
>>>> surface and volume files, and there seems to be a problem with the surface
>>>> files. Whenever I try to open a surface overlay (in .mgz format) in 
>>>> freeview
>>>> this error comes up;
>>>>
>>>> freadFloat: fread failed
>>>> freadFloat: fread failed
>>>> ...
>>>> [0]PETSC ERROR:
>>>> ------------------------------------------------------------------------
>>>> [0]PETSC ERROR: Caught signal number 11 SEGV: Segmentation Violation,
>>>> probably memory access out of range
>>>> ...
>>>>
>>>> When I try to convert this file to nifti format a seemingly similar error
>>>> comes up;
>>>>
>>>> (...) mri_convert rh.template_areas.mgz AU_areas_template_rh.nii.gz
>>>> mri_convert.bin rh.template_areas.mgz AU_areas_template_rh.nii.gz
>>>> $Id: mri_convert.c,v 1.226 2016/02/26 16:15:24 mreuter Exp $
>>>> reading from rh.template_areas.mgz...
>>>> TR=0.00, TE=0.00, TI=0.00, flip angle=0.00
>>>> i_ras = (1, 0, 0)
>>>> j_ras = (0, 1, 0)
>>>> k_ras = (0, 0, 1)
>>>> writing to AU_areas_template_rh.nii.gz...
>>>> NIFTI FORMAT ERROR: nslices 117239 in volume exceeds 32768
>>>>
>>>> I have tried to debug but failed so far. Has anyone come across a similar
>>>> problem and do you have an opinion onto what might be causing this? The 
>>>> same
>>>> adapted template's volume files work just fine.
>>>>
>>>> --I am using Ubuntu 16.04& freesurfer v.6
>>>>
>>>> Thank you so much!
>>>> Idil
>>>>
>>>>
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--
Douglas N. Greve, Ph.D.
MGH-NMR Center
gr...@nmr.mgh.harvard.edu
Phone Number: 617-724-2358
Fax: 617-726-7422

Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting
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