HP Officejet 4500 - Error messages appear

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Error messages appear

"Unable to activate TWAIN source" or "An error occurred while acquiring the

If you are acquiring an image from another device, such as a digital camera or another
scanner, make sure that the other device is TWAIN-compliant. Devices that are not
TWAIN-compliant do not work with the device software.

Make sure that you have connected the USB cable to the correct port on the back of
your computer.

Verify that the correct TWAIN source is selected. In the software, check the TWAIN
source by selecting Select Scanner on the File menu.