ReduceMesh Crashes All the Time

As stated in the title when I try to use reducemesh command on either complex or a very simple mesh object, it crashes everytime.
I used this command heavily in January and I don’t remember encountering this problem. This may be related to latest update but of course I am not sure. What information should I share here for developers?

Hi Bera - please run SystemInfo in Rhino and cpoy/paste the results here - if you have an example that crashes - along with the settings used, please post that as well, or send to with a link back here in your comments.


Untitled.txt (3.9 KB)
Mesh Sphere.3dm (2.9 MB)
Hi Pascal,
I uploaded a sample file which includes only a mesh sphere that I converted from nurbs. Even this crashes.

Hi Bera - thanks - this works here - reducing to 50%, also on an M1. I’ll update to 12.3 and see if that makes a difference.


You may be right, I updated to 12.3 a couple of days ago. That may be the trigger. Looking forward for your results.

Yep - crashes instantly on 12.3 - thanks for the report.
RH-67912 ReduceMesh: crash on mac os 12.3


RH-67912 is fixed in Rhino 7 Service Release 17