Rebuild Mesh window not showing up

No matter what I do, I can have ‘rebuild mesh’ window open up. Rebooted the computer didn’t help either. I use dual monitors, so I also tried to activate only one monitor. In Command line, I see that “_RebuildMesh,” but I can’t edit anything because there’s no editing window showing up. Any ideas?
Version 6 SR28

Hello - RebuildMesh does not have a dialog, if that is what you are expecting. It just ‘does it’ See Help on this command, it is not really related to the Rebuild command in any way.


Maybe you mean to use MeshRepair?

I probably need sleep. What I was trying to do was, ‘reduce mesh.’

It drove me crazy that I couldn’t simplify unnecessarily heavy Sketchup objects. Thanks for your replies.

Hi there,

I’m having a similar issue with _ReduceMesh dialog , I’ve updated Rhino and my Nvidia drivers then rebooted my PC but still nothing changed.

Any suggestions on how to fix this, please ?

A Rhino newbie

Hi Paul - what happens when you run the command - what does the command line say?


Hello Pascal,

As I run the command nothing but “Command : _ReduceMesh” shows up, I can still press enter to run it with the default settings, but I have no control on the target polycount.Thank you very much for the prompt reply.

Thank you very much for the prompt reply.

-Paul Boursy


Hi Paul -
Please run the Rhino SystemInfo command and copy-paste the result here.

Hi Wim,

Here it is :

Rhino 7 SR31 2023-6-15 (Rhino 7, 7.31.23166.15001, Git hash:master @ 850d276b2d59d7e51843939e4cf674b356bcd354)
License type: Évaluation, build 2023-06-15
License details: Cloud Zoo
Expires on: 2023-10-08

Windows 10 (10.0.19045 SR0.0) or greater (Physical RAM: 32Gb)

Computer platform: LAPTOP - Plugged in

Non-hybrid graphics configuration.
Primary display and OpenGL: NVIDIA GeForce GTX 1080 (NVidia) Memory: 8GB, Driver date: 7-12-2023 (M-D-Y). OpenGL Ver: 4.6.0 NVIDIA 536.67

Integrated accelerated graphics device with 4 adapter port(s)

  • Windows Main Display is laptop’s integrated screen or built-in port
  • Secondary monitor attached to adapter port #1

OpenGL Settings
Safe mode: Off
Use accelerated hardware modes: On
Redraw scene when viewports are exposed: On
Graphics level being used: OpenGL 4.6 (primary GPU’s maximum)

Anti-alias mode: 4x
Mip Map Filtering: Linear
Anisotropic Filtering Mode: High

Vendor Name: NVIDIA Corporation
Render version: 4.6
Shading Language: 4.60 NVIDIA
Driver Date: 7-12-2023
Driver Version:
Maximum Texture size: 32768 x 32768
Z-Buffer depth: 24 bits
Maximum Viewport size: 32768 x 32768
Total Video Memory: 8 GB

Rhino plugins that do not ship with Rhino

Rhino plugins that ship with Rhino
C:\Program Files\Rhino 7\Plug-ins\Commands.rhp “Commands” 7.31.23166.15001
C:\Program Files\Rhino 7\Plug-ins\Export_FBX.rhp “Export_FBX”
C:\Program Files\Rhino 7\Plug-ins\rdk.rhp “Renderer Development Kit”
C:\Program Files\Rhino 7\Plug-ins\RhinoRenderCycles.rhp “Rhino Render” 7.31.23166.15001
C:\Program Files\Rhino 7\Plug-ins\rdk_etoui.rhp “RDK_EtoUI” 7.31.23166.15001
C:\Program Files\Rhino 7\Plug-ins\rdk_ui.rhp “Renderer Development Kit UI”
C:\Program Files\Rhino 7\Plug-ins\NamedSnapshots.rhp “Snapshots”
C:\Program Files\Rhino 7\Plug-ins\RhinoCycles.rhp “RhinoCycles” 7.31.23166.15001
C:\Program Files\Rhino 7\Plug-ins\Toolbars\Toolbars.rhp “Toolbars” 7.31.23166.15001
C:\Program Files\Rhino 7\Plug-ins\3dxrhino.rhp “3Dconnexion 3D Mouse”
C:\Program Files\Rhino 7\Plug-ins\Displacement.rhp “Displacement”