I am currently using an AVIC-D1 with a burned CNDV-80MT navigation disk. The upgrade took and this disk has worked fine in my system for 3 months but now i'm receiving the error message: Route calculation was not possible

Whenever I enter in a new address or try to select something from the address book. I did a search first before posting this question but couldn't find anything that would address this issue.

Did you try phone #

I didn't try the phone number but I do not think this version of the product will allow you to look up an address by the telephone number.