@MO - thanks I think you have the bug diagnosed there, when the curve is click selected then Flow flips its direction but the Trim processing part of the script is only looking for a trim fragment that is in the natural curve direction.

I should be able to tune up the Trim logic later today.

Thanks for figuring out the bug depended on the click selection location that made it seem kind of random.

I'll also see about adding in a trim function on curves so that can be used in the future instead of the trim factory which is kind of awkward to script.

- Michael