it cannot open that file meaning that it does not exist or you do not
have read permisssions

On 07/20/2017 11:01 AM, miracle ozzoude wrote:
> Hello Freesurfer,
>
> I am trying to average out all the time frames for my pet images by
> using mri_concat. However, I am getting an error (see below). How can
> I resolve this issue? Thanks.
>
> Best,
> Paul
>
> My command = mri_concat frame1.nii.gz frame2.nii.gz frame 3.nii.gz
> frame4.nii.gz --o Aveframe.nii.gz --mean
>
> FreeSurfer error:
> ninputs = 4
> Checking inputs
> niiRead(): error opening file
> /User/shared/Paul/library/PET/AGPA1F/PET-AV45/subject1/subject_frame1.nii.gz
> ERROR: reading subject_frame1.nii.gz
>
>

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Douglas N. Greve, Ph.D.
MGH-NMR Center
greve@nmr.mgh.harvard.edu
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