It says “route calculate failure, Here – Cobra Digital 7750 PLT User Manual
Page 43
8.3) “Route Calculate Failure”
This error means that the nav unit cannot find a legal route based on the parameters of your
truck. Here is an example:
EXAMPLE
In West Virginia, the maximum legal truck length is 70 feet (due to the winding mountain roads).
If the you enter a length greater than 70 feet, the nav unit will not route anything into, out of, or
through West Virginia. You will get a Route Calculate Failure.
Recommendations
1. Double-check your truck settings.
a. Tap anywhere on the map screen.
b. Tap on CONFIGURE (in the upper-right).
c. Tap on TRUCK.
Make sure that you did not make a mistake when entering the length, width, or weight. For
info on these settings, please click
2. Try setting up a new truck, and just use the default settings. If the nav unit now routes, then
you know that one of your settings was causing the problem.
3. Drive a little towards the destination and try again. This will only work if the restriction is
near your current location. If the restriction is near the destination, then you will continue
to get a Route Calculate Failure.
4. If you chose to travel to a city without entering a complete address, the nav unit may have
arbitrarily chosen an address that is inaccessible by truck. Try entering an actual address.
5. If you call Cobra Customer Service at 773-889-3087, we can double-check the route for
you. Please be prepared to provide the following information:
a. Your truck info (the truck type, weights, lengths, and load type).
b. The starting address (or at least the starting city).
c. The destination address.