Flow Problem

I am starting to use the flow command. I would like to get the red curve to flow along the blue curve. But I just get a failure with no error message. What needs to be corrected?
Screen Shot 2020-05-16 at 11.11.20 PM

Have you looked at the Help file article for Flow?
http://docs.mcneel.com/rhino/6mac/help/en-us/index.htm#commands/flow.htm?Highlight=flow

Yes, that is what i was following. I am just getting is

Failed to morph one object.

With no explanation.

Maybe post the curve? Is it a valid (not bad) object?

Sorry, I had dragged and dropped it with the picture but its not there. Here.

Problem Flow 1.3dm (4.7 MB)

Yep, I see that fails…

-Pascal

My guess is the target curve is so gently curved, it’s falling outside of the limits built into the command. That would be a question for the developer.

I’ve played around with the Angle tolerance a bit (your 0.001 degrees was absurd but worth trying), but so far I’m not finding a work-around with Flow

You might try an array along the curve of one repeatable tooth as an alternative.

https://mcneel.myjetbrains.com/youtrack/issue/RH-58548

It works if you set PreserveStructure=Yes…

BTW, Rhino does not like the curve very much, aside from having almost 5K segments, asking Properties>Details takes over a minute here to show up and when trying to measure something the osnaps here seem like they’re stuck in molasses…

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fails, but you can explode then flow and then join
Problem Flow 1.3dm (1.8 MB)

if you rebuild the polyline you may have better luck.
but it must explode
Problem Flow 1 (1).3dm (4.1 MB)

This happens with PreserveStructure=YES

In my actual file, before copying, I was using 1/32" as the tolerance.

I tried rebuilding. It works in vikthor’s file but not in mine.