Hey there, I seem to be having a problem. I had created my own training plan as workouts put them on my calendar and then sent them to my device. In all I created 180 workouts. The problem occurs when I try to upload activities when the workouts exist on my 910xt. Garmin Express 3.1.7.0 will just throw a generic error saying it was unable to sync the data. If I try to upload via the website that just sits there retrieving activities. During either process the watch will flip between an activity screen and the transferring data screen, but nothing gets uploaded. If I delete the workouts everything works fine. I was able to test this and reproduce this scenario several times.
Any advice would be appreciated.