A friend at work is working on a pc and has these problematic curves. They join in to a closed curved but when you extrude them it says there are self intersecting curves. They extrude as surfaces but if you join them they go weird . I polylined over the top and got the same results. Attached is the 3dm, system info and a screen grab. Im working on a Mac and when she gave me her file it happened on my machine as well.
I had her open a new project and redraw it from scratch and its working fine.
Any ideas what has caused this ?
GlennPROBLEM CURVES .3dm (10.1 MB) SYSTEM INFO.pdf (29.2 KB)