Hi,
Whenever we launch Grasshopper, we get an error saying that “Iteration Selection” from Colibri version 0.2.6348.33183 is missing.
It is quite a recent issue so it could be because of either Rhino 8 SR31 upgrade (06 may 2026) or colibri update (1 April 2026)
We have disabled “Automatically update packages when Rhino starts” because we want more control over plugin versions. However, Colibri now appears to have updated to version 2.1.0 (published 01.04). I’m not completely sure whether it updated automatically or whether I installed it manually while trying to fix the issue.
We have tried:
-
Downloading and installing the missing/unknown objects
-
Uninstalling Colibri and TT Toolbox
However, the error still appears.. When uninstall colibri we got even more errors (second image)
We are several people experiencing the same issue.
The issue is also slightly disruptive because the error window sometimes locks itself, forcing us to restart Rhino and Grasshopper.
Any help would be greatly appreciated. Thank you.