Cannot add elevation value to gpx vertices

In the following attachment there are two gpx files (gps tracks):
Tracks.zip
1) 1.gpx - the original. Every track point / vertex has it's own position, date&time, elevation. Global Mapper can modify the elevation value of the vertices.
2) 2.gpx - the original + some additional points added / edited with Garmin BaseCamp, and closed with />. The additional vertices have their own position, but no date&time and elevation data. Global Mapper cannot read and modify / add elevation: „There was no terrain data available for the entire feature.”
Is this something normal or a bug? I repeat: It is impossible to add elevation values to any vertices (track points) – regardless of whether they have date&time+elevation data or not.
Tracks.zip
1) 1.gpx - the original. Every track point / vertex has it's own position, date&time, elevation. Global Mapper can modify the elevation value of the vertices.
2) 2.gpx - the original + some additional points added / edited with Garmin BaseCamp, and closed with />. The additional vertices have their own position, but no date&time and elevation data. Global Mapper cannot read and modify / add elevation: „There was no terrain data available for the entire feature.”
Is this something normal or a bug? I repeat: It is impossible to add elevation values to any vertices (track points) – regardless of whether they have date&time+elevation data or not.
Comments
Let me know if I can be of further assistance.
Thanks,
Mike
Global Mapper Guru
gmsupport@bluemarblegeo.com
http://www.globalmapper.com