Curve.ExtendStart-Curve.ExtendEnd not work with negative numbers

[tranbachks1]

Hi every one
I just experienced Dynamo on Revit 2025
The problem is Curve.ExtendStart-Curve.ExtendEnd not work with negative numbers
Can you help me fix
Thank every one

[sovitek]

Hello @tranbachks1 and welcome guess that node can only extend…for negative you can try trim curves…

[christian.stan]

Hi,
Pay attention to the recursion on the curve

cordially
christian.stan

[tranbachks1]

Thank so much!

[tranbachks1]

Thanks @christian.stan
I understood how to do it