When I have a RoboHelp HTML 6.0 project open and select from
the Projects tab, Single Source Layouts > Printed Documentation,
I get a pop-up window RoboHelp HTML error message: The parameter is
incorrect. Well, I press OK and the screen doesn't close; I try to
close the error message window, again no success. I have to close
RoboHelp from the Windows Task Manager.