List.ReplaceItemAtIndex -> System.Collections.ArrayList

[Nick_Boyts]

I looked at your errors again and realized you’re getting the ArrayList error, not just a general structure error. This means you likely have an issue with one of your installed packages. You can find a little more context here:

Find items in list using two nested list values

@Nick_Boyts Well…I solved the issue. It was due to Orchid. Either the recent update to Revit 2024 or updating to the newest version of Orchid was the issue (I did both of those things around the time that this may have broken). In either case, removing the Orchid package fixed the issue. To be clear, no Orchid nodes were used in the graph…simply having it installed was causing the issue. This may be due to a strange interaction between Orchid and Orkestra that is currently being looked at.…