Posted by dellus on May 23, 2022; 5:53pm
URL: https://forum.librecad.org/hatching-is-neither-displayed-in-the-pdf-nor-in-the-printout-tp5721698p5721713.html

It is as I suspected. The hatching's line width is "by layer", and the layer's pen setting is 0.00 mm.
Depending on the printer and the pdf-viewer this can result in the lines indeed not be shown.
Change the hatching's line width to a value other than 0.00 mm, perhaps 0.13mm, via Tools - Modify - Attributes.