I need to be able to follow a pre-defined GPX track without having the device continuously trying to recalculate a route because it thinks I should rather be on some road on the map. Unfortunately setting the Route recalculation to "OFF" does not seem to work and the unit constantly pops up a "Route recalculation Error. No routable roads on the map". Then another window pops up offering to do a "Straight Line" navigation. The only solution that I have found is to turn the "Off Course Warnings" to "OFF". This is less than ideal as the "Off Course" warning if I deviate from the pre-defined GPX track are very useful. Surely setting the recalculation to "OFF" should prevent the device from attempting to recalculate the route.