Slightly different problem to others here. I have searched all the forums and help pages for an answer, but there's nothing about this specific Garmin Issue. I uploaded a ride yesterday which showed no altitude data so I deleted from Garmin Connect thinking I'll just 'force send' again from the device (Garmin watch 410). It's still in the history of the device but will not upload to Garmin Connect & hence to Strava.
I have deleted all other activities from device, done a soft reset, checked the one I want is still there, then done a few seconds new activity test which uploads fine, but yesterday's ride will still not upload - how to make the stored activity upload when the 'force send' does nothing??