Hi

As a test for a project I'm working on, I've projected a curve onto a single planar surface, highlighted the projected curve and then turned on history update.

It doesn't work in V3 or has that functionality never been there ?

It works fine when you create a curve from two intersecting surfaces and enable history update on the curve. When you modify the curve of one of the surfaces, it updates in that instance.

Hi Kevin - that used to work in v2 as long as the projection generated one curve and not multiple separate curve pieces. It seems to have been broken along the way somewhere in v3, probably with some changes that helped narrow down some history relationships to help prevent history records from getting excessively large in data size when a large number of objects were selected as inputs in one single operation.

I'll investigate what is involved in fixing it. It's probably not a difficult fix but the difficulty will be that I don't have any upcoming release set up for the near future.

- Michael

Ok, thanks Michael for clarifying it.

I just couldn't remember whether it used to work or not.

It can wait till you have a chance to fix it. If you solve it, maybe it can be released with a future V4 Beta.