? Split failed, objects may not be within tolerance of one another

I find myself unable to diagnose the problem here.

Both curves are planar at position z 0. “Intersect” finds an intersecting point. Yet running “split” results in an error. I’m getting this a lot in another file I am working on too. Just can’t find a reason…

simple_circle.3dm (103.9 KB)

I don’t think you can split a closed curve at a single point with Split. The resulting error message is misleading/incorrect because the objects are within tolerance. Add another line crossing the circle, run Split, select both lines as the splitting objects and the circle is split into two parts.

That makes perfect sense davidcockey. Thanks for your reply!