"I vaguely recall that there was a setting in Plotmaker to print hairlines. If all the lines are very fine then this may be the problem."
Sorry to be so dense, but I am completely lost. I see PlotMake in the computer. Opened it up, but could not find any thing regarding hairlines. And does PlotMaker affect how ArchiDraw prints to the printer.
"Another thing to check is to make sure the pens have weight. It is possible the pens were all set to the same width. This would be odd though because the PMK files retain the pen settings of the ArchiCAD model unless reset in Plotmaker (which is a recommended practice - but I can't get into that now)."
I can change pen weight in plotter setup in Archidraw, but not on printer setup.
And at this point, the client isn't printing to a plotter. Just a printer.
If all else fails, he may have to just put the file(s) to disc and have another company print them.
I really appreciate your time and advice.