This means the ChimeraX session file .cxs was created with a newer ChimeraX than what you have.  You need to install the current ChimeraX (version 1.12).

   Tom

On Sep 22, 2026, at 10:17 AM, Allen Place via ChimeraX-users <chimerax-users@cgl.ucsf.edu> wrote:

I am trying to run my student’s imaging of our some proteins by running the .cxs file I was sent.  I am getting the 
following error.

To restore session:
  • install Scenes bundle version 0.3.1 or newer
  • install Animations bundle version 1.0 or newer


How do I install these bundles?  It is unclear how I do this/
Al

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