I've had this problem before (just reinstalled lyx), but forgot how I solved it: when printing to my networked PS printer, I get an error: "Unable to print. Check that your parameters are correct.."
When looking in Edit/Preferences/Output/Printer i find that Printer command is set to "dvi2ps -o $$o $$i" When looking in Edit/Preferences/Converters, I find that DVI -> Postscript is also dvi2ps Any suggestions ? Im pretty sure this is a rather banal problem which requires only a change in Preferences, but who knows ... Soren O'Neill, Denmark
