Curve Boolean- Overlapped curves missing

Untitled video - Made with Clipchamp|video
Hi,
I was trying to generate closed curves for topography with Curve Boolean, but some curves seem have conflicts and could not exist at the same time, as the video uploaded.

Does anyone know how to fix it?
Thanks!

Hello- please post the curves in a Rhino file here (public) or send to tech@mcneel.com, with a link back here in your comments.

-Pascal

Hello - choose CombineRegions=No and AllRegions - I think that gets them all. But I think your workflow does as well.

-Pascal

Hi, thank you for replying.
Bit I did choose the options as you said (as in the video).
Does my file work normally on your computer?

Hi -

Yes.
2023-02-03 CurveBoolean

Please run the Rhino SystemInfo command and copy-paste the result here.
-wim

Hi -

I’m afraid you appear to be running a very old and cracked copy of Rhino. We can’t help you with your problems with that one…
-wim

let s picture this…

well… you’ll need a few meters of water on the outside of that and see what happens on the inside…
-w

_showEdges