problem in linking viewer selection with current editor - Eclipse

Just switch your Project Explorer to the Flat package presentation in Eclipse. It works :)

see details here: https://bugs.eclipse.org/bugs/show_bug.cgi?id=530450#c7

Per the Eclipse manual:

PermGen is the permanent generation of objects in the VM (Class names, internalized strings, objects that will never get garbage-collected). An easy, if somewhat memory-hungry fix is to enlarge the maximum space for these objects by adding

-XX:MaxPermSize=128M

as an argument to the JVM when starting Eclipse. The recommended way to do this is via your eclipse.ini file.

If you are getting OutOfMemoryErrors while running Eclipse, the VM can be told to let the heap grow to a larger amount by passing the -vmargs command to the Eclipse launcher.

-vmargs
-Xms512m
-Xmx1024m

Alternatively, you can invoke the Eclipse executable with command-line arguments directly, as in

eclipse [normal arguments] -vmargs -XX:PermSize=512M -XX:MaxPermSize=1024M -Xmx1024M [more VM args]