This refactoring function in Eclipse for package names used to work for me fine until... today:

This is the first time I am receiving this weird Refactoring error, and I have no idea what to make of it:

An exception has been caught while processing the refactoring 'Rename Package'.

Reason: Problems encountered while moving resources.

Click 'Undo' to undo all successfully executed changes of the current refactoring. Click 'Abort' to abort the current refactoring.

What could possibly explain this sudden "change of heart" and how do I fix it?

enter image description here

java eclipse refactoring
Edit
Report