Rhino ui slow to respond

Greetings. I am trying to track down a lag issue that has been driving me batty.
After rhino has been running for a while (week or so) i start to get UI lag. it will stick for a second then get back to working. does this every few min. only way to fix seems to be a full reboot. closing all rhino sessions does not seem to fix. am working mostly in 2d lines; in wire frame mode.
happens with both rhino 5 and 6 (mostly use 5 cuz am old and do not want change); as of getting forced onto win 10

Please run the V6 SystemInfo command and post the results.
This will give us a good overview of what resources Rhino sees.


And, if you close and reopen Rhino, does the problem go away?


closing all rhino sessions does not fix. sometimes if am lucky an older session will work fine but new sessions have the glitch

below is sysinfo

Rhino 6 SR29 2020-8-25 (Rhino 6, 6.29.20238.11501, Git hash:master @ 06b936ae4e8c289ecccfd6b5ee9bacccc60eded1)
License type: Commercial, build 2020-08-25
License details: Stand-Alone

Windows 10.0 SR0.0 or greater (Physical RAM: 32Gb)
Machine name: MAKER2

Non-hybrid graphics.
Primary display and OpenGL: NVIDIA Quadro P4000 (NVidia) Memory: 8GB, Driver date: 1-29-2020 (M-D-Y). OpenGL Ver: 4.6.0 NVIDIA 442.19

OpenGL Settings
Safe mode: Off
Use accelerated hardware modes: On
Redraw scene when viewports are exposed: On

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

Vendor Name: NVIDIA Corporation
Render version: 4.6
Shading Language: 4.60 NVIDIA
Driver Date: 1-29-2020
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
C:\Program Files\Rhino 6\Plug-ins\Commands.rhp “Commands” 6.29.20238.11501
C:\Program Files\Rhino 6\Plug-ins\rdk.rhp “Renderer Development Kit”
C:\Program Files\Rhino 6\Plug-ins\RhinoRender.rhp “Rhino Render”
C:\Program Files\Rhino 6\Plug-ins\rdk_etoui.rhp “RDK_EtoUI” 6.29.20238.11501
C:\Program Files\Rhino 6\Plug-ins\rdk_ui.rhp “Renderer Development Kit UI”
C:\Program Files\Rhino 6\Plug-ins\NamedSnapshots.rhp “Snapshots”
C:\Program Files\Rhino 6\Plug-ins\RhinoCycles.rhp “RhinoCycles” 6.29.20238.11501
C:\Program Files\Rhino 6\Plug-ins\Toolbars\Toolbars.rhp “Toolbars” 6.29.20238.11501
C:\Program Files\Rhino 6\Plug-ins\3dxrhino.rhp “3Dconnexion 3D Mouse”
C:\Program Files\Rhino 6\Plug-ins\Displacement.rhp “Displacement”

Hello -
How many sessions are active at once?

If you close all Rhinos and start a new session, is that ever a problem?

Do you regularly keep sessions open for a week?


usually 2-6 instances of rhino. depends on project load. more projects more rhino.
i will have a file open as long as a project is going. never shutdown or reboot the computer if i can help it.

i think it is partly something to do with windows. never had a problem on win7.

only fix seems to be a full reboot.

Hi -

I’m with you on that one, but I do see overall (that is, not Rhino-specific) performance degradation over time and just need to reboot to get things (Chrome, Windows Explorer, Word, etc…) running again. I’m afraid that you’ll just have to do that once in a while.

I can not be the only person that thinks reboot is un-acceptable solution. Am i the only one that thinks win 10 is going to the bad old days of win95? next thing is going to be reinstall the computer every 6 months.

miss my linux… uptime 400+ days being normal…

it’s back to acting up…

how do i track things lagging in rhino?

this is driving me batty and reboot is not an option right now.

any diagnostic console or logs i can see what is not responding quickly?

gotta be something. is it ram? did windows push rhino onto the vram? is it graphics drivers being dumb? disk access time/

rhino is doing something every 30 seconds or so. it laggs out the ui.

  • Please run the Rhino SystemInfo command and send those results.
  • How many monitors are you running?
  • Is this a laptop or a desktop?
  • How are the monitors connected to the computer?
  • Are your files stored on the local computer?


get unknown command for systeminfo is it called something else by the command line?

ryzen 3700x
2 screens
32gb ram
network file
wired connection
rhino 5

it had been fine until i stressed grasshopper. now all rino instances lag.