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The printer is connected to the computer with a USB cable
but the cable may not have been attached before installing
the software.
Uninstall, and then reinstall, the software.
The error message 'two-way communication
cannot be established' or 'printer not
responding' appears
The printer might not be able to communicate with the
computer if the USB cable is too long.
If you receive this error message, ensure the USB cable is
not greater than five meters (approximately 16 feet, 5
inches) in length. Connect the printer directly to the USB port
on the computer and not to a USB hub.
The error message 'there was an error writing
to LPT1' appears