Posted by dellus on Dec 01, 2020; 8:20pm
URL: https://forum.librecad.org/Export-print-to-PDF-tp5719778p5719802.html

I opened V25.dxf in LibreCAD V2.2.0 rc  on Windows and exported it to pdf, it came out right: v25_220_export.pdf

I then examined the lines which were "missing" in your faulty pdf and found they were linewidth "by layer" and the according layers had 0.00 or default which is the same.

So it looks like LC for Mac 2.2.0 uses a different pdf rendering engine than LC for Mac 2.1.3, or you have used a different machine with a different Mac OS version. The question is how line width 0.00 mm is handled.

You can test the theory by changing the linewidth of missing lines to a realistic value like 0.18 mm directly or by changing layer properties (select layer with right mouse button - Edit Layer Attributes).