Hmm, trying this out for the first time and I’m not managing to install the Rhino-MCP-Platform plugin.
Packagemanager shows me a checkmark saying it is installed and I already tried restarting rhino as well as windows
But I’m not seeing it in the pluginmanager and when Claude launches Rhino I get the following in the commandline:
Command: _MCPSpawn
Unknown command: _MCPSpawn
And Claude doesn’t manage to continue.
Any suggestions on how to proceed?
I would try
Let me know if that helps or not, or if you’ve already tried this.
I just went through those steps and same issue unfortunately. 
I cannot see it in the pluginmanager either. Is it possible to download the plugin somewhere and install it manually from pluginmanager?
Strange that the packagemanage does show it as installed with the checkmark though…
Is that screenshot after a restart?
What does your %appdata%\McNeel\Rhinoceros\packages\8.0 folder look like?
What’s in that Rhino-MCP-Platform folder?
Sure looks like a complete plugin.
I’m gonna ask internally, I’m stumped 
Here’s my systeminfo as well:
Systeminfo.txt (2.6 KB)
Weirdly enough it doesn’t show any rhino plugins that do not ship with Rhino even though I’m certain I have some that I’ve made for myself.
@CallumSykes I think I found the issue!
So I had an older plugin of mine that I was trying to run recently and when I tried it gave me an error and the following message in the command line:
Some plugins may not be compatible with .NET Core. To use .NET Framework, use the SetDotNetRuntime command.
So I used the setdotnetruntime command to run NETFramework so I run my plugin.
Now I switched it back to NETCore and restarted rhino and the plugin pops up
Great!! That’s fab
