I cannot create a person

Hello, I followed the steps of the examples of the wiki to make a CRUD with Person table.

READ functioning properly, but does not work CREATE, UPDATE, and, DELETE, with Person table, but with AAA table if.

My data model is:

The SiteView for AAA table, CRUD works correctly are:

The SiteView (only works READ) to the Person table, a copy of the previous SiteView (AAA):

In Person SiteView to CREATE or UPDATE options I have the same error: "java.lang.NullPointerException"

Details:
* Could not create service 'mfu3' from class: class com.webratio.units.operation.rtx.db.ModifyUnitService
* Error creating service: mfu3 - WEB-INF/descr/mfu3.descr

And, when I select the option DELETE, nothing happens in Person SiteView

Thanks,

Jose