Since last update (v5.50) my edge 530 does not allow me to use the back to start feature. No matter on which profile or map i'm using or if I ask ask for the most direct route or the same route back, when I hit back to start, it shows "calculation error". I reinstall garmin and custom maps and still not working.
The weird thing is that navigating to a map point or to a saved location works properly.
Any ideas?