Do you perhaps have a Mylyn task active that has no resources in its
context? Try toggling off the Mylyn focus in the Project Explorer to
see if that helps.
On 2014-08-25 08:33:07 +0000, Fran Gomez said:
> I think this is a bug. When I first open Eclipse with Papyrus
> perspective, the project explorer shows the project's tree. But when I
> go over to the explorer to select a project, the tree disappears.
I don't know about the Mylyn, but I found the solution when I was looking for it. In the submenu that appears when click on the triangle button, there was the option Top Level Elements> Working sets selected. Because I have no working set defined...
So I select Top Level Elements> Projects and everything is fine now!