From: Axel Kohlmeyer (
Date: Fri Feb 17 2023 - 06:45:21 CST

Please note that this script is very, very old. You should compare the
individual script commands with the User's Guide to see what current
options are in case there were changes.

When using -dispdev text, you don't have access to the OpenGL buffer and
thus you cannot use the "snapshot" option of the "render" command. Instead
you could use the TachyonInternal option to use the integrated Tachyon
raytracer library.

When using -dispdev text, you also do not have automatically access to the
TopoTools commands. They are in a package that is loaded by the VMD GUI,
but not when you launch VMD in text mode. Thus you need to add the command
"package require topotools" before you can use any "topo" commands.

When there are errors in a function they don't always show.

On Fri, Feb 17, 2023 at 6:33 AM Marin Paolo Virgile Vatin <> wrote:

> Good morning,
> I am a postdoc researcher. I would like to use VMD to make a movie of a
> lammps dynamics trajectory using “-dispdev text”.
> I have a problem with the script make_trajectory_movie_files that does not
> work in my case. I want to get images that show the correct topology of my
> molecules.
> Here is what I have done so far:
> - incorporated the script make_trajectory_movie_files into a script
> generated by doing “save visualization state”
> - modified the script to read the topology with topo “readlammpsdata
> <topo>” and the trajectory with “mol addfile <traj>”
> - run the script with the option “-dispdev text”
> I do not get any error message, but I get empty images or wrong topology.
> There is no problem when I run the script with the window except for
> slowness.
> Has anyone encountered this problem or knows how to solve it?
> Thank you in advance for your help.
> Best regards,

Dr. Axel Kohlmeyer;!!DZ3fjg!-4jIp6Xo7HhNaBmDXypESbbxUcKuD1g1-iu1d26EJfJaW472hK4iDyR0MmPsryG82n2y9iFs51Ylzm1-9g$ 
College of Science & Technology, Temple University, Philadelphia PA, USA
International Centre for Theoretical Physics, Trieste. Italy.