I’ve seen this a couple of times in the past month:
The history object was copied text that I edited via doubleclicking. Then this popup at the next time I run SaveSmall. I always use save small - the current file is big and slow to save even without render meshes.
Does this make any sense? It doesn’t seem like SaveSmall should have have anything to do with history. Maybe this has always been there and I am just using history more for a current project? It’s not very repeatable though, I did this same process a lot of times, and just happened once today.
Running x64 Rhino 5.6.31028.18305 on Windows 7.