There is a routing problem on the border crossing at the South of Western Sahara. Other OSM based routing software is OK and I have discussed this on the OSM forum and they say the data is OK - it must be the software (Navigator 14 free).
No route can be found it you set a start on the N1 north of the border and end on the N5 south of the border. The exact spot that there appears to be a gap at the northern border post.
This is routing using walking as well as bicycle which should use the track in no mans land between the border posts.
Please be more specific where this is. Specify coordinates or something we can search on. Both N1 and N5 can't be found as such in openstreetmap.org or nominatim
... yes, but it is better/faster to copy it here too: https://www.openstreetmap.org/way/251493757 highway track smoothness horrible surface sand ... so you need to enable this type of road (i.e. pedestrian crosses this road).
I fixed the "where the primary roads are not properly connected" problem. Don't know if it helps Mapfactor since other routhing engines did now show problem.
It is not possible to do a route from Western Sahara to Mauritania.
Doing a route by car sends you 1000s of miles around North Africa, doing a route by bicycle (border is a track not a paved road) says route is not possible.
This is using both the Windows and Android versions of Navigator and the latest OSM maps.