Recently when I try to set the nav to go home or to my "go to" location it has been saying "unable to calculate route" about 60% of the time. I haven't done anything differently, and I haven't changed any of the settings. I have not done the firmware update yet so the nav has been locking up. Is it possible this problem is a result of overheating?

Am I the only one having this problem?

I have never experienced nor heard about this error.