For some time now, I have not been able to view the grid/spreadsheet of all activities - I get a frowny faced emoticon with the following message:
"Can't create a measurement with NaN value.18 - percentage 17 - difference"
I can however view individual activities by clicking on them from the 'dashboard', and using the prev/next arrows to work back through activities.
Suggests to me that there's something, somewhere in the data that is causing the view to choke.. Would be good to know what / how to fix it, can't seem to find any way of reporting it as an issue to garmin /customer support directly, I presume this forum is it?