The new link contained in
Europe_Online_DEM25.vrt works as expected in difference to the one to
World....wcs. I can see some data transfer over the net but no elevation data. Is there a restriction to some regions? I tried locations in Germany and Spain without success.
Might the logfile message with "VRT" point to a problem? I didn't use a VRT as described by Mitxel.
2018-03-20 13:30:20.967 [debug] VRT: try to open "D:/GPS/DEM/World_Online_SRTM900.wcs"