Not tested with PDF direct, but this is usually the best solution

lcPrinter=getprinter()
if !empty(lcPrinter)
   Set printer to name (lcPrinter)
   Report form....
else
   Messagebox('No printer was selected')
endif

>I use program PDF redirect for redirecting report to PDF file. On some PC, when PDF redirect is not default printer, and user choose printer PDF redirect from a list, error occurs with message "error loading printer driver".
>
>When PDF redirect is default printer, everything is working fine.
>
>Any ideas?
>
>Thanks in advance.