I am developing a filter to search for an entity.
The filter creates a proxy for the entity to seek, and then use this proxy 
with RequestFactory.
The problem is that the entity being validated do not know why.

The request is:
*Request <List <EntityBaseProxy>> findByProxy (EntityBaseProxy proxy);*

Their counterpart on the server is:
*public List <EntityBase> findByProxy (EntityBase proxy) {
   Query query = em.get (). CreateQuery ("from EntityBase and WHERE 
e.namelike: arg1");
   query.setParameter ("arg1" proxy.getName ());
   List list = query.getResultList <EntityBase> ();
   return list;
}*

The error I am getting is as follows:

*Caused by: java.lang.RuntimeException: The call failed on the server due 
to aConstraintViolation 
atcom.google.web.bindery.requestfactory.shared.Receiver.onFailure 
(Receiver.java: 44) at com.google.web.bindery . 
requestfactory.shared.Receiver.onViolation(Receiver.java: 66)
....
....*
*
*
Thanks!!!

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