Question

I have a class source (or other file) open in the Eclipse edit (say Foo.java) and do a search for (say) “Foo” which returns a line in the Search window. When I click on this it loads a second instance of the source, both called “Foo.java” and both mapped onto the same file. If I try, say, autocompletion on the first window it behaves normally but on the second it gives “This compilation unit is not on the path of a Java project”.

I am using

Version: Helios Release
Build id: 20100617-1415

EDIT:

• Why does this happen?
• Why is one instance on the build path and the other is not?
• How can I prevent two
  windows appearing?

Answer 1

There doesn’t seem to be a clear answer other than, probably, to reinstall Eclipse