We have been getting LPR communication failed errors on multiple printers
throughout the day since applying SP6. It is always different printers.
If you go to the NDPS MAnager screen, select the printer > Status and
Control: > Shut Down Printer > Start Up Printer, it will*usually* begin
printing again without issue. I'm almost to the point now where I'm
going to back-rev to SP5 just to get some stability back.