If you are receiving the screen message that the printer failed to open when trying to print a plan without a plot layout there are two things you can do:
1) go into the IRRICAD folder, commonly C:\Program Files\AEI Software\Irricad Pro 10 and find and delete the Presets.cfg file
2) go into Draw|Plot Layout and click the Save as Defaults button (after checking your printer is correct). Then exit the dialog without creating a plot layout for this design and it will now print without a problem.