I originally created a number of waypoints on Basecamp, then exported them to my GPS. I later modified the locations of many on my GPS. Basecamp now gives me an error message and no longer shows these waypoints.
The Basecamp message I get when I connect:
There was a problem communicating with Oregon 450T
An error occurred while reading the following file(s):
E:/Garmin/gpx/Route.gpx
I am able to see everything else from my GPS on Basecamp.