Don't know why these two similar surfaces will not interesect

In a case such as this, I usually intersect the two and using part of the intersecting curves, am able to trim one from the other to make a nice meeting of one surface to the other. For whatever reason, in this case I can’t make these two intersect, trim or otherwise recognize each other.two pieces of trim that will not intersect.3dm (3.4 MB)

Hi Robb - for now, run DivideAlongCreases SplitAtTangents=Yes on these object… that should allow the intersection to work but you’ll have polysurfaces. (V6 does get this right on the originals)

-Pascal

Thanks, Pascal, this particular problem seems so out of the ordinary. These are not complex surfaces.

I should add that I opened this file in V6 Beta, trimmed it all easily and saved as a V5 file to bring into the project to which these originally belonged. All is good in my little boat design world!

And, here’s a quick rendering of work in progress that shows the trim pieces in place…