Terry uses an Epson scanner/printer but he can't export it to PDF. An error occurs. Leo says that a PDF creation program could be an easy workaround that can talk to the printer. But it sounds like a corrupted driver. Terry should go to Epson.com to download and install all the latest drivers.
The chatroom suggests trying to export the PDF from the printer first. There are options on the printer/scanner itself. If it works, then he'll know it's an issue with his computer connection. What Leo advises is to remove the printer entirely and reinstall it. That can completely remove the drivers and then reinstall them.