Error with Restlet sample project

Question

I downloaded the sample Restlet project and opened it in Eclipse. I instantly get this error:

Errors occurred during the build.
Errors running builder 'Google WebApp Project Validator' on project 'org.restlet.example.serialization.gae-gwt'.
java.lang.NullPointerException

What am I doing wrong?

Answer 1

I had this same error with my own project. In the Eclipse Project Explorer I right-clicked the project and chose Refresh. That cleared up the error for me.

Answer 2

This is a temporary, but repeatable solution someone on my team found...

Close project Close Eclipse Open Eclipse Open project

Answer 3

I continually had this problem in combination with git. My git repository was in my eclipse workspace ( even though eclipse warns you not to do this ). Deleting the old repository, and creating a new git repository outside of the eclipse workspace, then cloning a fresh copy of my gwt project solved this problem for me. Hope this helps.