Like "I will try it again. EDIT: I tried it again with 444 and then also with 601 I had no problem with either entry. Take a look at your logbook. When you are in the place where you input your before, after meal readings does it read mg/dl or mmol/l? Or does it read %? If it reads % you're trying to put your reading in the A1c place rather than the BG place, and I tried it there and I got a message that I was "invalid percentage" and wouldn't let me do it. BTW are you using a computer to imput your numbers, or using a smartphone app? "