I use the software EndNote X4 and I read «No references selected» when I click on each of «My groups». So when I try to add references by exporting, this message appears again and I can’t select it. I know my references are still there, because we see the number of references. Could someone tell me if there is something to do?
When you click the group name you display the references in the group, but they’re not selected at that point.
Just put the cursor in the library window and press ctrl/A (or drag over all the references to highlight them). They’re then selected and you can use export etc.