This error occurs when you edit a workbench resource outside of Eclipse.
To fix this problem, right click the project or edited resource and select “Refresh”.
If you edit outside of Eclipse a lot, you can enable auto-refresh by going to Window->Preferences menu, then in the Preferences dialog box, select General->Workspace.
Check the “Refresh automatically” box.


This solved my problem
Yes! This solved my problem to
Great! Thanks!
Thank you man.