nimo stephan [http://community.jboss.org/people/nimo22] created the discussion "Re: Hibernate Tools does not support ElementCollection ?" To view the discussion, visit: http://community.jboss.org/message/563455#563455 -------------------------------------------------------------- Unfortunately not. There is not stacktrace when compiling and deploying the application. The ElementCollection is working. Only when opening the HQL-Editor the error comes. I go to "rebuild configuration". Then the branch of +configuration+, +session factory+ and +database+ is opened. The error is displayed in the +SessionFactory branch+: "*<SessionFactory error:* *Could not determine type for java.util.list for table, at table  MY_TABLE, for columns: [org.hibernate.mapping.Column(PHONE_NUMBER)]*" -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/563455#563455] Start a new discussion in JBoss Tools at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&...]