I got home from the gym and thought to myself that I should remove and re-add my printer. Well, removing it was no problem but I found I had difficulties re-adding it. 
I go to menu->administration->printers->add.... but don't know what to do past that. I tried entering the ip address of the printer into the URI field and into Network printer->host field but that didn't work. What am I doing wrong?

:-)~MIKE~(-:

On Thu, Oct 23, 2014 at 12:15 AM, Michael Havens <bmike1@gmail.com> wrote:
I got home from work and figured out why gscan2pdf isn't working. The printer isn't connecting to the system! I tried printing a test page and the Printer State field runs between 'processing' and 'rendering completed' but nothing prints. It is a wireless printer and I have no notes on setting it up (why? I have NO idea) If you could please help and I will write the notes down and then not bug you about it and possibly be able to help others.

:-)~MIKE~(-:

On Wed, Oct 22, 2014 at 11:00 AM, Michael Havens <bmike1@gmail.com> wrote:
I got a problem: after I open gscan2pdf an info window appears saying:

   Save as DjVu requires djvulibre-bin
   unpaper missing
   OCR requires gocr, tesseract, ocropus, or cuneiform

after I close that window the little progress bar then runs back and forth as it is "opening device".  Then an info window appears saying, :

   "Error opening device: Invalid argument"

It was working. It was doing this with gscan2pdf version 1.2.3 (the apt version) so I updated  it to version 1.2.6 but it was still doing it. I googled 'gscan2pdf "Error opening device: Invalid argument"' but their were only 4 results. The only one of which might have helped said to: 

   rm  ~/user/.gscan2pdf
   rm: cannot remove ‘/home/bmike1/user/.gscan2pdf’: No such file or  
      directory

I then  ran apt-get for the programs it said were missing and now only the "Error opening device: Invalid argument" info window appears.

Any ideas as to how to resolve this?

:-)~MIKE~(-: