cannot generate PDF

[Robert Lauriston]

If Save As PDF isn't working for you because you have not selected
Adobe PDF or some other true Adobe PostScript printer, printing to
Adobe PDF will solve the problem, not because there's anything wrong
with Save As PDF but because you've selected Adobe PDF.

I believe there were some bugs in Save As back in the 5.x / 6.x era,
but I've had zero problems with it in years.