On either side of the printer inside, there is a place where the reel of paper goes. I think you may find a spring loaded arm that moves onto the reel of paper to give a warning when the paper is low and a new reel is needed. So open up the printer, and look for a lightly spring-loaded arm, and find a way to hold it out of the way- either cellotape, sticky tape or plasticine/Blue Tack. You are right- this message can drive you mad every couple of minutes!