I have connected a Canon Pixma 450 printer to my computer via USB cable. The computer is operating on ubuntu 12.04. The system recognises the printer and I follow the procedure step by step to set up the printer. Eventually I reach the stage where a window opens asking if I want to print a test page. I accept, but after a moment or two a window opens saying : CUPS Server error. Can anyone tell me how to resolve this. The printer works fine on another computer with Windows 8.
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