When I had an Etrex HCx, I always had to process Audax organisers' GPXs to reduce the number of points. Now, with an Edge Touring Plus, I can drop the files straight in. However, I often find that the device displays "Calculating route" for maybe ten minutes, and sometimes it then reports a "Route calculation error", even though there presumably isn't anything wrong with the file.
What's the best thing to do to get a good file for the device? I don't want to lose control points and so on if those have been added. Is there a recommended maximum number of points?
I've got most features turned off as per standard advice. The odd thing is that, having failed to calculate the route, it still shows the track anyway, which is all I really want. So, if there were a setting to stop it calculating in the first place, I'd probably do that!