Hi all. I updated to the latest Rhino 8.17. But when I am trying to Open Rhino Inside Revit , Revit crashes (when other Revit plugins are active ) and RIR works fine ( when other Revit plugins are disabled). Kindly assist in solving this issue. I found any of one of the plugins between Pollination or Climate studio is loaded Revit crashes. I also tried with Rhino Sr 18 (Service release candidate version) but it still crashes. Everything working fine with rhino 8.16 version.
Likely a conflict, I don’t have your plugins, so I cannot reproduce it, can you investigate which plugin causes the crash so we can try to reproduce it?
@tay.othman Climate studio and Pollination plugins are causing crash here. If any one of them is active, RIR fails to run and crashes Revit. Both were working correctly with Rhino Sr 8.16 version.
do you have Pollination installed inside Rhino as well? It may be a cause of the plugin being called twice.
Additionally, you can close everything, delete the contents of the folder below:
C:\Users<yourname>.rhinocode
and Run Rhino inside revit and let me know.
I had disabled the rhino pollination plugin earlier and I tried reopening RIR after deleting all from the folder you mentioned, but the issue still persists. 
If I disable pollination and keep Climatestudio on, still Revit crashes. So both the plugins has the issue. RIR only works if both plugins are disabled
I just installed pollination for Revit, and it seems fine. I have Revit 2024.3
Wondering how you got 2024.4?
Okay, I was able to reproduce it in Revit 2025.4 (not 2024) a sign of a .Net DLL Conflict
Update:1 The conflict is incompatible versions of Eto, Rhino upgraded the Eto dll to from version (2.8.4 to 2.9) while Pollination uses Eto (2.7). Thus when Revit starts, Pollination loads Eto 2.7 and makes RIR impossible to load it’s own Eto.
Update 2: @asisintel here is a potential solution:
1- Close Revit completely
2- Go to “C:\ProgramData\Autodesk\Revit\Addins\2025\Pollination.Revit”
3- Make a backup copy of the files “Eto.dll” and “Eto.Wpf.dll”
4- Go to Rhino System Folder “C:\Program Files\Rhino 8\System”
5- Copy “Eto.dll” and “Eto.Wpf.dll” to the pollination plugin folder mentioned above.
6- Override the existing files.
7- Run Revit and RIR, It works for me now:
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Thanks for check. It was my mistake in naming the Revit version. I have 2025.4 Revit installed.
Let me get back to you once I follow your steps. Just one thing , as Climate studio is also causing error, do we have some work around for that too? Thanks again for timely help.
No worries,
for Climate Studio it is likely the same Eto DLLs, I don’t have access to it and I don’t want to sign up for trial, but likely you will find the same conflicting DLLs if you are going to “C:\ProgramData\Autodesk\Revit\Addins\2025\ClimateStudio”
That worked for Pollination. Unfortunately for Climate studio the location “C:\ProgramData\Autodesk\Revit\Addins\2025\ClimateStudio doesnt exist.”
Perfect! Working now perfectly. Thank you for solutions! 
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