For the past few days, after the MDX starts the NAVI screen comes up white with a message saying "Downloading Software, Please Wait" and this is followed by another white screen saying "Please check your disk". This has been intermittent, but it's happening more often.

This disables all functionality of the info systems in the car, including the rear-view camera. I found no reference to this message in the manuals I got with the car. Any ideas???

Thanks...Jeff