Has anyone had success with the GPX file import to the new Garmin Connect in Activities? The GPX file I tried is valid because it process perfectly on http://www.gpsvisualizer.com but I get an error trying to import to Connect.
Just because you imported the file into some other service does not mean that it is valid when using Garmin Connect's definition of valid. Often you will be able to import gpx/tcx files into Garmin Connect, but only after opening them in a text editor and tweaking them. If you post a link to your gpx file, we may be able to help you get it working.