What Marta found on her screen at 3:00 AM—after the laptop had died and she had resorted to reading the printer’s internal logs via a serial cable—was not an error. It was a diary.
The (often called "AdjProg") is a specialized service utility designed to maintain and repair this specific printer model by interacting with its internal firmware. Primary Functions of the Adjustment Program Adjustment Program Epson Artisan Px720wd