RiR - Grasshopper Load Error (Revit 2024)

Rhino.Inside Revit
1

Hello,

I’m getting the following loading error when trying to open Grasshopper using RIR with Revit 2024.

I can open it in Revit 2025 no problem but need 2024 for a specific project.

When I open Grasshopper I don’t see the Revit tab. I can search for RIR nodes and add them to the canvas that way but they are not present on any toolbar.

Grasshopper will still open after the error but this is what I see:

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I can still search for RIR components and add them to the canvas:

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But no toolbars show up…

System Info:

Rhino 8 SR28 2026-1-21 (Rhino 8, 8.28.26021.13001, Git hash:master @ 13ca4c596ccf597975b83e41bd87ab486f6c3f4a)
License type: Commercial, build 2026-01-21
License details: Cloud Zoo

Windows 11 (10.0.26100 SR0.0) or greater (Physical RAM: 64GB)
.NET Framework 4.8.9310.0

Computer platform: LAPTOP  - Plugged in [100% battery remaining]

Standard graphics configuration.
Primary display: DisplayLink USB Device (DisplayLink) Memory: 0MB, Driver date: 12-18-2024 (M-D-Y).
> External USB display device with 4 adapter port(s)
- Windows Main Display attached to adapter port #0
Primary OpenGL: NVIDIA GeForce RTX 3080 Ti Laptop GPU (NVidia) Memory: 16GB, Driver date: 12-30-2025 (M-D-Y). OpenGL Ver: 4.6.0 NVIDIA 591.74
> Integrated accelerated graphics device with 4 adapter port(s)
- Video pass-through to primary display device

Secondary graphics devices.
Intel(R) Iris(R) Xe Graphics (Intel) Memory: 1GB, Driver date: 10-26-2022 (M-D-Y).
> Integrated graphics device with 4 adapter port(s)
- There are no monitors attached to this device. Laptop lid is probably closed
DisplayLink USB Device (DisplayLink) Memory: 0MB, Driver date: 12-18-2024 (M-D-Y).
> External USB display device with 0 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
GPU Tessellation is: 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: 12-30-2025
Driver Version: 32.0.15.9174
Maximum Texture size: 32768 x 32768
Z-Buffer depth: 24 bits
Maximum Viewport size: 32768 x 32768
Total Video Memory: 16 GB

Rhino plugins that do not ship with Rhino
C:\Program Files\Enscape\Enscape.Rhino.Plugin-net48\Enscape.Rhino8.Plugin.dll	“Enscape.Rhino8.Plugin”	4.14.0.668

Rhino plugins that ship with Rhino
C:\Program Files\Rhino 8\Plug-ins\Commands.rhp	“Commands”	8.28.26021.13001
C:\Program Files\Rhino 8\Plug-ins\rdk.rhp	“Renderer Development Kit”	
C:\Program Files\Rhino 8\Plug-ins\RhinoRenderCycles.rhp	“Rhino Render”	8.28.26021.13001
C:\Program Files\Rhino 8\Plug-ins\rdk_etoui.rhp	“RDK_EtoUI”	8.28.26021.13001
C:\Program Files\Rhino 8\Plug-ins\NamedSnapshots.rhp	“Snapshots”	
C:\Program Files\Rhino 8\Plug-ins\MeshCommands.rhp	“MeshCommands”	8.28.26021.13001
C:\Program Files\Rhino 8\Plug-ins\IronPython\RhinoDLR_Python.rhp	“IronPython”	8.28.26021.13001
C:\Program Files\Rhino 8\Plug-ins\RhinoCycles.rhp	“RhinoCycles”	8.28.26021.13001
C:\Program Files\Rhino 8\Plug-ins\Grasshopper\GrasshopperPlugin.rhp	“Grasshopper”	8.28.26021.13001
C:\Program Files\Rhino 8\Plug-ins\RhinoCode\RhinoCodePlugin.rhp	“RhinoCodePlugin”	8.28.26021.13001
C:\Program Files\Rhino 8\Plug-ins\Toolbars\Toolbars.rhp	“Toolbars”	8.28.26021.13001
C:\Program Files\Rhino 8\Plug-ins\3dxrhino.rhp	“3Dconnexion 3D Mouse”	
C:\Program Files\Rhino 8\Plug-ins\Displacement.rhp	“Displacement”	
C:\Program Files\Rhino 8\Plug-ins\SectionTools.rhp	“SectionTools”

Error (Occurs after clicking the Grasshopper start button in the RIR tab in Revit):

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Object: GLShaderComponent (level 1)
{
Exception has been thrown by the target of an invocation.
TargetInvocationException
}

Object: GLShaderComponent (level 2)
{
Could not load type ‘System.Threading.Tasks.Task`1’ from assembly ‘System.Runtime, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a’.
TypeLoadException
}

Priority: CategoryIcon
{
Could not load type ‘System.Resources.ResourceManager’ from assembly ‘System.Runtime, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a’.
TypeLoadException
}

Thanks for the help!

2

Lets start with a quick uninstall / reinstall of RiR.

Is Revit 2024 in the typical install location?

If that is not the case it could be a conflict with another Revit addin, although i don’t recall this particular toolbar issue. 2025 handles conflicts better, as well ships with a addinmanager.

In 2024 Rhino.Inside®.Revit

1 Like
3

Thanks @Japhy , I have tried that 3 times along with manually clearing remaining files in temp folders and such and doing a system reboot after reinstall.

Yes, it is in the C/Program Files/Autodesk/Revit 2024 which matches all other Revit version I have installed as well (2022-2026)

In reading the article you linked it sounds like pyRevit could be a conflict. I’m directly looking at that now and going to attempt o remove that and report back

EDIT:

Okay I did not have PyRevit but I did have RevitPythonShell so I deleted/removed that add-in and others I wasn’t using but the error is the same still.

EDIT 2:

Okay, if I check the command history in Rhino I see what is happening:

Load Enscape.Rhino.Plugin …
Enscape.Rhino.Plugin started.
An error occured during GHA assembly loading:
Path: C:\Users\micha\AppData\Roaming\Grasshopper\Libraries\pedsimulation_4.gha
Exception System.IO.FileLoadException:
Message: Could not load file or assembly ‘file:///C:\Users\micha\AppData\Roaming\Grasshopper\Libraries\pedsimulation_4.gha’ or one of its dependencies. Operation is not supported. (Exception from HRESULT: 0x80131515)

Exception System.NotSupportedException:
Message: An attempt was made to load an assembly from a network location which would have caused the assembly to be sandboxed in previous versions of the .NET Framework. This release of the .NET Framework does not enable CAS policy by default, so this load may be dangerous. If this load is not intended to sandbox the assembly, please enable the loadFromRemoteSources switch. See 
 for more information.

An error occured during GHA assembly loading:
Path: C:\Users\micha\AppData\Roaming\Grasshopper\Libraries\GHA\Ggraph.gha
Exception System.IO.FileLoadException:
Message: Could not load file or assembly ‘file:///C:\Users\micha\AppData\Roaming\Grasshopper\Libraries\GHA\Ggraph.gha’ or one of its dependencies. Operation is not supported. (Exception from HRESULT: 0x80131515)

Exception System.NotSupportedException:
Message: An attempt was made to load an assembly from a network location which would have caused the assembly to be sandboxed in previous versions of the .NET Framework. This release of the .NET Framework does not enable CAS policy by default, so this load may be dangerous. If this load is not intended to sandbox the assembly, please enable the loadFromRemoteSources switch. See 
 for more information.

EDIT 3:
Removing the above plugins did not solve it

4

Ok, a addin/plugin issue for sure.

Two helpful troubleshooting methods:

Start a new instance of Rhino by Shift+Cntl clicking the Rhino Icon and choosing the 1st option. This unloads Revit addins.

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Then open Rhino and start Grasshopper via the commandLine with GrasshopperLoadOneByOne and say no to all the 3rd party (first 11 are shipped with Rhino)

1 Like
5

This did in fact work, disabling 3rd party plugins. I’m not sure which plugin is causing the issue but at least this will work for now.

Thank you @Japhy, could you remind me how to show what third party plugins I am running so I can start narrowing the problemed plugin down?

6

You can see all that are being loaded here. Some may need to be manually moved out of gh resource folders or removed via package manager.

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