tx170754

Hello everybody,
The car Is a 2007 LS with less than 50,000 miles. Had the car for three years bought with 20,000 miles. I’m quite happy with the car, it is the second Japanese one. Everything seems to be working fine except in the last year the navigation was working intermittently. After reading about how to eventually reset the system last night I have disconnected the battery, now after reconnecting I have the very well known message “ A program cannot be read”, I have an appointment with the dealer on Friday, until then has anybody, please, any idea if this can be fixed easily ? Any help would be appreciated.
Thanks !