This is fixed in v7.2, but if you want to patch your current freesurfer distribution, you can try these commands:

cd $FREESURFER_HOME/bin

sudo mv fsvglrun fsvglrun.backup

sudo curl -O https://raw.githubusercontent.com/freesurfer/freesurfer/dev/scripts/fsvglrun

sudo chmod +x fsvglrun

best

Andrew

From: freesurfer-bounces@nmr.mgh.harvard.edu <freesurfer-bounces@nmr.mgh.harvard.edu> on behalf of Lab of Autism and Developmental Neuroscience, Lab of Autism and Developmental Neuroscience <ladn@email.gwu.edu>
Date: Tuesday, August 17, 2021 at 2:43 PM
To: Freesurfer support list <freesurfer@nmr.mgh.harvard.edu>
Subject: [Freesurfer] LGI - output issue

        External Email - Use Caution        

Good afternoon FreeSurfer experts, 

Hope that everyone is well and staying safe! 

I tried opening LGI freeview (or tksurferfv) output, and I have been running into the following issues (see code and error message outputs below). Any ideas how I could fix this? Please let me know if additional details are needed. 

Bolded code is what I inserted. Outputs are not bolded. 

tksurfer HAR30303_srs2_2 lh inflated -overlay lh.pial_lgi

zsh: command not found: tksurfer

tksurferfv HAR30303_srs2_2 lh inflated -overlay lh.pial_lgi

ERROR: cannot find lh.pial_lgi

cd $SUBJECTS_DIR/HAR30303_srs2_2/surf

tksurferfv HAR30303_srs2_2 lh inflated -overlay lh.pial_lgi

freeview -f /Applications/ace_complete/HAR30303_srs2_2/surf/lh.inflated:curvature=/Applications/ace_complete/HAR30303_srs2_2/surf/lh.curv:overlay=lh.pial_lgi:overlay_threshold=2,2,5 -viewport 3d

/Applications/freesurfer/bin/fsvglrun: line 20: conditional binary operator expected

/Applications/freesurfer/bin/fsvglrun: line 20: syntax error near `FS_ALLOW_VGLRUN'

/Applications/freesurfer/bin/fsvglrun: line 20: `if [[ ! -v FS_ALLOW_VGLRUN ]]; then'

Also within the surf folder, I tried something like: freesurfer -v lh.pial_lgi

Output in freeview was just a dark screen - tried changing the color map but nothing improved this issue. 

Thank you so much!