The Nav V is a very good device, more than capable of rendering up and running routes.
In your thread:
https://www.ukgser.com/community/threads/unable-route-file-insufficient-space-navigator-v.552491/
You told us that you’d created a 5,000 mile trip, which the Nav V was (understandably) incapable of loading. This you then told us, you’d split the 5,000 mile route into two parts, but not the length of each. This MIGHT be your problem. If the route is too long, then the device cannot cope with it. That though is just a guess, based on your description in post #1, Another possibility is that you MIGHT have sections of the map missing. Another possibility is that you MIGHT have something in your preference settings that is conflicting with the device’s ability to render up a route. Yet another, MIGHT be that the route you have asked the device to display and run is badly created, making it impossible for the device to run it. In short, we can keep guessing.
To help you, please:
A. Share with us the route(s) that you have created, so the forum members can check and, hopefully, run them.
B. Check what settings you have active on your device in ‘preferences’.
C. Without running the route, display the map on your device. Zoom in on it. Can you see see all the small detail of the roads, right from where you are standing through to the Slovenian border and beyond? This is an easy way to see if the full detailed maps are installed correctly and active.
D. Do NOT do a hard reset. That will very probably wipe all your routes from your device, along with any favourites you have created and maybe need. Only do this if you have a way to back up your device and reload the routes and favourites.