Electronics Repair Questions? Ask an Electronics Technician
Hi, thank you for contacting JustAnswer.com. My name is Russell. I will do my best to provide the right answer to your question.
It is possible that the license for your charts is only for one device. Regardless of login status, it would refuse to work on a second device.
This is even more likely if the one device it works on, is the first device you loaded the maps onto, or accessed the maps from (or first in other ways perhaps.)