Hi, I'm also having a problem with the snapshots coming out black on CentOS 7 (but not CentOS 6). I'm using a slightly modified version of the first tcl script located on this page: http://surfer.nmr.mgh.harvard.edu/fswiki/QaImageScripts, and the following command:

tkmedit $subject brainmask.mgz -tcl tkmedit_snapshots.tcl

Using the script on two different CentOS7 systems results in black snapshots when running with either Freesurfer 5.3 on a Freesurfer 5.3 result, or with Freesurfer 6 on a Freesurfer 6 result. I've tried using SaveRGB and SaveTIFF in the tcl script but get blank black snapshots both ways. Snapshots come out normally on a CentOS 6 system, for Freesurfer 5.3 and 6. Does anyone know what might be causing this, or any potential workarounds?

Thanks,

Sarah

From: freesurfer-bounces@nmr.mgh.harvard.edu <freesurfer-bounces@nmr.mgh.harvard.edu> on behalf of Ehsan Adeli <eadeli@gmail.com>
Sent: Thursday, July 26, 2018 7:38 PM
To: freesurfer@nmr.mgh.harvard.edu
Cc: Kilian Pohl
Subject: [Freesurfer] QAtools tkmedit snapshots are black

External Email - Use Caution

Hello,

I tried to create snapshots with tkmedit, but the output snapshot files are all black. This is the command:

export SUBJECTS_DIR=./
tkmedit blubber norm.mgz

tkmedit shows the image correctly, but when taking a snapshot it is all black. No error messages are displayed. I was wondering if anybody else had a similar issue and if there is any solutions to that.

Thank you very much, in advance.

Sincerely,

Ehsan Adeli, Ph.D.,

Stanford University

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