Hi Guys, Updated my Rhino 8 this morning to Rhino 8 SR36 2026-10-6 Rhino 8, 8.36.26279.07001 and now I get this error on loading any of my plugins that contain Python Scripts: [Screenshot 2026-10-08 112941] Source code for DKUI is also broken: [Screenshot 2026-10-08 114740] Any fixes availabl…

261008_Systeminfo.txt (2.7 KB) SystemInfo attached.

In the DKUI source code, Python 3 components are working, IronPython components are broken. Cheers DK

OK - another symptom - after a PC restart, Rhino stalls on loading Grasshopper on a blank Rhino file. hhhhmmmm. DK

OK, I’ve found the source of the issue/a work around. [image] This error is showing an issue loading scriptcontext in IronPython. On a hunch I set the DotNetRuntime from NetCore v10 to NetCore v8 and the issue was resolved, Looks like something Eshan needs to look at ASAP. Cheers DK

Try if you can reload the ironpython from the tools. And restart the rhino

There was a change in Rhino 8.36 to .netcore 10 as default, NET 8 and 9 go end-of-life in November 2026.

Thats OK - and expected. BUT Ironpython now appears to be broken because of it? Thanks DK

Got it, will see what Ehsan says but this might even be able to be a hotfix. RH-99401 IronPython scripts fail on the .NET 10 runtime

same situation here… quite a big mess in the middle of a project

8.36.26279.07001 - broken python and plugins

Rhino Developer

kiteboardshaper (Kiteboardshaper) October 8, 2026, 12:04pm 8

Hi @MSAwan

I had already tried that - with no luck.

Here is the difference in behavior highlighted between v10 and V8 DotNet runtimes:

Thanks

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8.36.26279.07001 - broken python and plugins

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