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 tried a couple of options

1. delete cache files within .plugins
2. delete all index files in /.metadata/.plugins/org.eclipse.jdt.core
3. delete snap file in /.metadata/.plugins/org.eclipse.core.resources/.snap
4. -clean as a start up parameter
5. -initialize as a start up parameter

But I keep getting the error back randomly.

So far, the only option that worked consistently is removing the .snap file, the first time we launch eclipse after removing .snap file it works fine.

Also any time we launch it in a new workspace; it works fine. but we would hate to switch the workspace for this reason.

Moreover if we close and relaunch eclipse the issue comes back randomly.