I'm not certain this will work but please try and post results. Inside your entity bean change the setter method for the field you want to be null to something like this: public void setField(String field) | { | if("".equals(field)) | { | this.field = null; | } | else | { | this.field = field; | } | } View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4084017#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...