Can't draw OnOrtho OnPerp

Serengeti (Rhino WIP)
1

See movie attached

2

Hi Piotr - it’s just too difficult to see how things are oriented, in your clip - can you send an example file?

thanks,

-Pascal

3

Hi Pascal
i have created a new file but the problem persist.
Try drawing perpendicular line to the pink geometry.Can’t draw OnOrtho.3dm (42.7 KB)
WiP - latest build.