Eclipse could not delete error

Question

I\'m working on a project with Eclipse and by now everything was fine, but last time I\'ve tried building it, it returned the error,

\"The project was

Answer 1

Process Explorer showed that the Android Java .jar file that could not be deleted was used by javaw, a sub-process of Eclipse...

This seems buggy.

The workaround is to close Eclipse and delete the file from Explorer...