EclipseLink-6121 - org.eclipse.persistence.exceptions.QueryException

  Hi all,

I'm working in a web app using Weblogic 12c with JPA (EclipseLink). 

When I try to use one JPA "Subquery" in a CriteriaQuery. I have an error that follows:

Exception [EclipseLink-6121] (Eclipse Persistence Services - 2.3.2.v20111125-r10461): org.eclipse.persistence.exceptions.QueryException

Exception Description: The query has not been defined correctly, the expression builder is missing.  For sub and parallel queries ensure the queries builder is always on the left.

My code is:

CriteriaQuery<Message> query = cb.createQuery(Message.class); 

Root message = query.from(Message.class); 

 //Subquery 

Expression minExpression = cb.min(message.get("dateMessage"));

Subquery<Calendar> sub = query.subquery(Calendar.class);