I have this issue today. Tried nevest and previous version od BaseCamp on two PCs. Problem is with Epix (fresh out the box) and Fenix2. On etrex20 is ok.
Its some kind of global problem or what?
Try the steps in this FAQ https://support.garmin.com/support/searchSupport/case.faces?caseId=%7B9b0aa260-3f4b-11e4-eaba-000000000000%7D