Eclipse editor won't open

Question

My Eclipse cannot show the editor window.

Error:

Could not open the editor: The editor class could not be instantiated. This

Answer 1

I've got the same problem though my eclipse is much newer - 4.2 (Juno). For me the solution was to remove /.metadata/.plugins/org.eclipse.core.resources/.snap. Afterwards I found this bug in eclipse.org: Bug 178988 - Crash at startup due to ".snap" files.

Hope this will help somebody.