Hi, I am getting this error using a SQLServer database. JBoss version - 4.0.1. Could not store message: 37 msg=36 hard NOT_STORED PERSISTENT queue=QUEUE.Event Queue priority=4 lateClone=false hashCode=21058500; - nested throwable: (java.sql.SQLException: [Microsoft][SQLServer 2000 Driver for JDBC][SQLServer]Cannot insert duplicate key row in object 'JMS_MESSAGES' with unique index 'JMS_MESSAGES_IDX'.) Any ideas? Thanks. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4048001#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...