It seems dopdf didn't install correctly, so see this on uninstalling it completely - http://www.dopdf.com/forum/topic/completely-uninstalling-dopdf and after that reinstall the newest build from our site.
I'm not sure what happens. The only solution left you could check is here - http://www.dopdf.com/forum/topic/dopdf-does-not-appear-in-the-printers-list-after-installation with the framedyn.dll file. Otherwise, I cannot help in troubleshooting this.
jbsrealestate wrote:Re: Error creating PDF file write me an essay "Adobe reader could not open 'filename.pdf' because it is either not supported,... or damaged" This only happenes on this computer, the same files convert on other computers I have. I have ininstalled and reinstalled with no luck.
Looks pretty much like a compatibility issue with some other software installed on that particular computer.