Source is website, TET (trans euro trail) hungary.Just a warning: As noted earlier in this thread, you'll get a "No Route Found" if the track takes you to places where no road has ever been mapped. If you want to do that, you'll be better off with handheld 'hiking' device.
I am not seeing the uploaded file. Was it supposed to be attached to your message #19? It is possible that this system may require you to make another couple of posts before it allows uploaded files.
What will be the origin/source for your route information that you want to use?
But when I put the same GPX file in the Garmin Zumo XT, it worked perfectly fine; as far as I know, that's not a handheld hiking device. Also, when I used the same GPX file in the Osmand+ Android app, it worked without any problems.If you want to do that, you'll be better off with handheld 'hiking' device.
You can find this file on a their website (TET) and check it—it won’t read sector 5 and will alter sector 4. Those are the only two sectors I tried. Then, you can use the Osmand+ application to see what I’m talking about.