Error sending pdf with new customer

[dirkovision]

Made a new seller on the website mediaservices.hu (licensed) but when we want to send pdf to the customer, we get this error:

Fatal error: Call to a member function set_landscape() on a non-object in /home/media/domains/mediaservices.hu/public_html/administrator/components/com_netinvoice/pdfwriter/nbill_to_pdf.php on line 32

is this a serious error, as we cannot send out invoices, only in html. not everyone accepts that.
rgds.dirko

[dirkovision]

It has been solved, as the papersize has to be filled in at 'reseller' data. A4 Legal or so.
Then it works.

Thanks anyhow.

rgds
dirko