When beginning a process in either QuickBooks 2007, 2008, or
2009 that requires creating a pdf, such as reconciliation, emailing
invoices, or saving as PDF, and QuickBooks 2007 and either 2008 or
2009 are installed on the same computer, the following error is
displayed:
QuickBooks PDF converter -20 activation error
You cannot print directly to the QuickBooks PDF converter. pdf activation error -20, . Try
using the QuickBooks Save as PDFmenu
option.
It is then followed by the error message "Could not
print to printer"