Can't create pipes from lines

Hi all, I am trying create pipe from CAD link line. I followed the instructions on the forum, but at the last step I couldn’t create any lines and it was “null”.

We look forward to receiving help from you

I tried to change a little but the result is still the same, I don’t understand the reason

Hi @bao1296 try to check you have very short lines maybe…if so then filter them out or try join them to polycurve and use polycurve simplify and an explode…
And be sure you have dynamoiironpython 2.7 version 2.5 installed as i guess that node is from mepover