Why some of my points are marked as incorrect or "Path not Found" or "Unexpected error"?

A "Path not Found" message usually tells you there is a problem with one or more stops on your route and that stop/stops can’t be accessed by the public road (they are on an island, in a forest, really far from other stops). This case is pretty difficult to resolve with optimization algorithms automatically, so that will require some manual check of those stops by a user. To help you to resolve this, the app will mark stop/stops with known errors and can even exclude them from the optimized stops sequence.
P.S. There are some cases when the app can't show an error on a stop because there is no clear reason why. In this case, the app will rely on a user to check all stops manually and figure out those which do not look correct.
Vehicle type issue. Also, it can happen if your vehicle type is a big vehicle like a truck. The error will appear when the optimization algorithm and/or navigational services do not see any ability to build a route for this type of vehicle to one or more stop/stops (low bridges, narrow roads not suitable for a long or tall vehicle, etc.). This case is easy to resolve by changing a vehicle type to a car. Do not worry, the majority of vehicle types will do just fine on routes for a car, it is just those trucks that are really long, tall, or big that are going to face issues and absolutely must use a truck as a vehicle type.
Vehicle and route settings can affect the route look, its distance and affect the route "correctness". Please make sure you use the right settings to get the best results for your needs.
An "Unexpected Error" message usually tells you there is a problem with the number of stops in your route. MyWay Route Planner supports up to 198 stops + start and finish locations, or 199 stops + start locations without a finish. Please make sure you are not out of the limit.