Hello Doug, I fixed it. Thank you Best, Paul

On Thu, Jul 20, 2017 at 11:11 AM, Douglas N Greve <greve@nmr.mgh.harvard.edu

wrote:

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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