I am trying to install the jester king/import_3dm add-on. However I get this error. Anyone who might be able to help, thank you? Best Sørenenter image description here

I add the zipped file via preferences/addon and Install button. The add-on appears on the list but shows me this error. I am a newbie to blender, so this does not make a lot of sense to me.


1 Answer 1


The add-on is just a wrapper for the rhino3dm package, which is currently missing on your system.

The following steps should allow you to install the missing Python package:

  1. Open Blender and switch to the Scripting workspace.
  2. In the Text Editor press the + New button.
  3. Copy and paste the following script into the editor.
import bpy
import subprocess

    output = subprocess.check_output([bpy.app.binary_path_python, '-m', 'pip', 'install', 'rhino3dm'])
except subprocess.CalledProcessError as e:
  1. For Blender <2.83: Run the script by clicking on the Run Script button. For Blender >=2.83: Press the button with the play icon (triangle).
  2. Enable the add-on in the preferences.
  • $\begingroup$ There currently seems to be a breaking API change in v0.10.0 in rhino3dm, which means that v0.9.0 of rhino3dm is required until import_3dm is updated as well. $\endgroup$
    – Robert Gützkow
    Feb 24, 2020 at 21:30

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .