Whenever I try a manual upload of a tcx file from my pc to garmin connect I get an error message and can't seem to complete the task. I would like to take the route from ridewithgps and upload to garmin connect to see if I get better turn notice warnings on my garmin 510. Any ideas?
Garmin Connect only accepts uploading .tcx files that contain activity data. If you've previously followed this course and have an activity for it, there is an option to turn the activity into a course.