Change model unit with scale breaks history

Hi guys, I started off a small project in mm and needed to swap to meters, but then with scaling on I got this error message:
image

And that would be quite bad news if I had worked a lot on the project. But luckily I have not.
I have not checked IF this applies to copy - pasting, or importing, elements between two Rhino files with different units, so if you look into it please check that too.

Cheers.

Hei Jørgen!
Thanks for the report. I’ll write that up.

Apparently, copy-paste also kills history but you don’t get the warning.

That’s probably normal - in the sense that if you copy + paste an object, it adds the new object (copy) to the document with a different ID from the original. As History follows the original object ID, you won’t have any history on the new ID.

That makes sense and probably isn’t an easy fix - but it’s probably not what the user expects / wishes.