History update bug: Sweep 2 doesn't preserve cross section

To reproduce

  1. Recreate the red surface with “preserve first cross section” option on the magenta curve
  2. Move a control point on the green curve

rail-2-history.3dm (311.4 KB)

Hello-is this right?
rail-2-history_maybe.3dm (243.5 KB)


That appears to update history correctly, but I’m guessing you used something else than Sweep2?

(If only Rhino had “query edit”.) :wink:

That is a Sweep2. So, what did we do differently?


No idea… here’s what I did:

Yep - I see this, thanks.
RH-73239 Sweep2 history update glitch