Hi @raymond.gaetan which display mode are you using to print? Does it print well if you use the Hidden display? Which PDF printer are you using?
If the problem persists, could you share that 3dm file with us (email@example.com)? We will take a look then.
I have been using the “Hidden display” mode in my layouts and I have been using the ADOBE PDF (PRO) to print.
Actually… I have just tried the RHINO PDF… and my prints come out nicely!
I will use the RHINO PDF for the time being… but you may still want to check why the ADOBE PDF would leave some lines behind…
For your easy reference, I have sent a dropbox link to my model via email.
Very best regards,