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Tcsh and other programs/files freesurfer uses are not installed by default on Ubuntu linux.  So to install fresurfer and also have the system install what freesurfer needs to run, you should use one of the freesurfer  .deb package installers available from,https://secure-web.cisco.com/1rgwwg0ZifTyCWJ3xhoWAUKZbDTEFuO5WZbY_1_dwm2BQNh...; To install the 7.4.1 release on Ubuntu 22, you would download,https://secure-web.cisco.com/1EZiIcgCiIUVcrk2eIaKVHB6rJya2cl1VbO03hXbrJ8YSoW... On your machine you would change directories to where you downloaded that file and run the installer with the command,$ sudo apt install ./freesurfer_ubuntu22-7.4.1_amd64.deb That will install tcsh, other system files and install freesurfer under /usr/local/freesurfer/7.4.1.  Then you would set FREESURFER_HOME to /usr/local/freesurfer/7.4.1 and (re)set SUBJECTS_DIR to a path you can write to, e.g.,$ bash$ export FREESURFER_HOME=/usr/local/freesurfer/7.4.1$ source $FREESURFER_HOME/SetUpFreeSurfer.sh… output deleted ...$ export SUBJECTS_DIR=$HOME/subjects$ mkdir -p $HOME/subjects - R. On Dec 9, 2024, at 11:39, Barletta, Valeria <VBARLETTA@mgh.harvard.edu> wrote:Hello Freesurfers, I am trying to launch trac-all -prep on Ubuntu 22 but I am getting this error: -bash: /home/local/PARTNERS/vb922/freesurfer/bin/trac-all: /bin/tcsh: bad interpreter: No such file or directory Can you please help me figure out what is going on? Thank you,Valeria_______________________________________________Freesurfer mailing listFreesurfer@nmr.mgh.harvard.eduhttps://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer