I am using some navigation software to create a .gpx file from the planned track. I import it into Basecamp OK. The list shows all the way points and a set of tracks. The track list contains a full track and also the segments of the full track broken down into 500 nodes per segment. If I try to create a route from the complete track, Basecamp crashes. I've been able to create routes from all the segments OK, apart from the second segment. I've had a look at that segment and to my human eye, there are no obvious differences between that segment and any others. I've attached the full .gpx which contains the full track and the individual segments in case you are able to help me work out what is going wrong, many thanks, Mark.