Eclipse Open declaration in Java project

Question

In an Eclipse SVN project I have a problem; when I tried to open a declaration of one class, I got this error:

Problems opening an editor Reason : projectna         


        

Answer 1

I had this problem, too. It looks like after a search-in-workspace Eclipse opened a wrong file.

I pressed Ctrl + Shift + H (Open Type in Hierarchy), typed in the class name, and opened it. The file opened in a new tab, and everything was navigable again.

The difference in icons is: