PrinterView.php explained

The script PrinterView.php could neither find a valid URL parameter, nor a referring URL; and hence could not find the page you requested.

If you passed a URL as parameter to PrinterView.php, make sure that the URL was correct. The syntax is:

Where PRINTER_VIEW_URL is a valid URL on rnspeak.org.

In case you understand PHP, this is the code what caused this page to be loaded (unless you typed in the address of this page manually).

if (!$URL)
{
  if ($HTTP_REFERER)
    $URL = $HTTP_REFERER;
  else
    $URL = "http://www.rnspeak.org/PrinterViewErr.html";
}
			

Here are a few examples of the right usage:

View printer-friendly Web Typography article
View home page in printer-friendly format

If you're intererested in more, the script takes data from the HTML file passed using the URL variable (or as a referred-URL), strips off visual elements, applies an external printer friendly stylesheet, and then produces the resultant HTML.