Update Bugs

@BrianJ the latest RC update from 8.02.2022 messed up Rhino. Is there a way to roll back? Until now I am seeing the following errors:

  • Grasshopper startup
Priority: GhpyLoader
  Method not found: 'Microsoft.Scripting.Hosting.ScriptRuntimeSetup IronPython.Hosting.Python.CreateRuntimeSetup(System.Collections.Generic.IDictionary`2<System.String,System.Object>)'.
  • EditPythonScript: Unknown Command
  • VisualArq objects failing (might be unrelated)

Rhino 7 SR16 2022-2-8 (Rhino 7, 7.16.22039.15001, Git hash:master @ 03d9447136d66e554d335bfc7e790f06e19f7485)
License type: Educational, build 2022-02-08
License details: Cloud Zoo

Windows 10.0.19044 SR0.0 or greater (Physical RAM: 32Gb)

Computer platform: LAPTOP - Plugged in [99% battery remaining]

Non-hybrid graphics configuration.
Primary display and OpenGL: NVIDIA Quadro RTX 3000 (NVidia) Memory: 6GB, Driver date: 12-29-2021 (M-D-Y). OpenGL Ver: 4.6.0 NVIDIA 511.09
> Integrated accelerated graphics device with 4 adapter port(s)
- Windows Main Display is laptop’s integrated screen or built-in port

Secondary graphics devices.
Intel(R) UHD Graphics (Intel) Memory: 1GB, Driver date: 12-3-2021 (M-D-Y).
> Integrated graphics device with 3 adapter port(s)
- There are no monitors attached to this device. Laptop lid is probably closed

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: 12-29-2021
Driver Version:
Maximum Texture size: 32768 x 32768
Z-Buffer depth: 24 bits
Maximum Viewport size: 32768 x 32768
Total Video Memory: 6 GB

Rhino plugins that do not ship with Rhino
C:\Program Files\Rhino 7\Plug-ins\Tibidabo\Tibidabo.rhp “Tibidabo”
C:\Program Files\Rhino 7\Plug-ins\Tibidabo\VisualARQ.rhp “VisualARQ”
C:\Users\silvano\AppData\Roaming\McNeel\Rhinoceros\packages\7.0\EleFront\4.2.2\ElefrontProperties.rhp “ElefrontProperties”
C:\Users\silvano\AppData\Roaming\McNeel\Rhinoceros\packages\7.0\SubstanceImporter\2.0.1\Substance.Win.rhp “SubstanceImporter”

Rhino plugins that ship with Rhino
C:\Program Files\Rhino 7\Plug-ins\Commands.rhp “Commands” 7.16.22039.15001
C:\Program Files\Rhino 7\Plug-ins\WebBrowser.rhp “WebBrowser”
C:\Program Files\Rhino 7\Plug-ins\rdk.rhp “Renderer Development Kit”
C:\Program Files\Rhino 7\Plug-ins\RhinoScript.rhp “RhinoScript”
C:\Program Files\Rhino 7\Plug-ins\RPC.rhp “RPC”
C:\Program Files\Rhino 7\Plug-ins\IdleProcessor.rhp “IdleProcessor”
C:\Program Files\Rhino 7\Plug-ins\RhinoRenderCycles.rhp “Rhino Render” 7.16.22039.15001
C:\Program Files\Rhino 7\Plug-ins\rdk_etoui.rhp “RDK_EtoUI” 7.16.22039.15001
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\Alerter.rhp “Alerter”
C:\Program Files\Rhino 7\Plug-ins\RhinoCycles.rhp “RhinoCycles” 7.16.22039.15001
C:\Program Files\Rhino 7\Plug-ins\Grasshopper\GrasshopperPlugin.rhp “Grasshopper” 7.16.22039.15001
C:\Program Files\Rhino 7\Plug-ins\Toolbars\Toolbars.rhp “Toolbars” 7.16.22039.15001
C:\Program Files\Rhino 7\Plug-ins\Displacement.rhp “Displacement”
C:\Program Files\Rhino 7\Plug-ins\Calc.rhp “Calc”

Hello- can you try repairing the installation?

(and re-boot)


@pascal Thanks. I repaired and restarted. Unfortunately no change. I am still on the same version.

@pascal I started Rhino in safe mode. Then _EditPythonScript → Load IronPython Yes → Gives the following error:

Command: EditPythonScript
Error occurred loading plug-in
Method not found: ‘Microsoft.Scripting.Hosting.ScriptRuntimeSetup IronPython.Hosting.Python.CreateRuntimeSetup(System.Collections.Generic.IDictionary`2<System.String,System.Object>)’.


at RhinoPython.Host.get_Engine()
at RhinoDLR_Python.IronPythonPlugIn.OnLoad(String& message) in D:\BuildAgent\work\commercial\src4\rhino4\Plug-ins\ironpython\plugin\IronPythonPlugIn.cs:line 119
at Rhino.PlugIns.PlugIn.InternalOnLoad(Int32 pluginSerialNumber)

I see - to go back, you can find older installers here:


though you may need to hunt around for the right one.

Uninstall Rhino and then run the installer for the version you want assuming you can find it - let me know if not. But you should be able to run the latest, of course, I’lll see what I can find out.

@silvano - confirmed, the RC does indeed have this bug - best to go back to 7.15 which is now the official release.


Hi Everyone,

Thanks for reporting the issue, I’ve logged it as RH-67409 to get that fixed up!

1 Like

Thanks everybody for the help and for prioritizing this one.

Regarding my initial post’s mentioning of VisualArq objects stopping to work, I can confirm it is related. The objects that stopped working, are Grasshopper based object styles. I assume since GH is starting with errors, those objects cannot get their geometry from GH.

Version 7.15.22039.13001: OK
Version 7.16.22039.15001: Above bug is present

After a bit of investigation, I found that I can reproduce this when IronPython 2.7.11 is installed separately to the GAC, so uninstalling (or unchecking the GAC check box on its installer) may help in the meantime.

1 Like

@curtisw Thanks for investigating this. Uninstalling IronPython from the GAC solved the problem for me.

@silvano Awesome, glad to know that works for you. A fix is coming that will not require you to do that in the future.

RH-67409 is fixed in Rhino 7 Service Release 16