Steps To create a fresh Service Builder or rebuild service builder:

1. Delete the “xxx-portlet-service.jar” from docroot/WEB-INF/lib folder

2. Delete all the files and folders inside WEB-INF/classes.

3. Delete “service” folder inside WEB-INF

4. Delete “model” folder from the src/com/package-path

5. Delete “base” and “persistence” folders inside package-path/service

6. Delete “META-INF” inside WEB-INF/src

7. Do ant-build-service of the portlet

8. Refresh the portlet.