We are inserting a value into JBM_DUAL, and we should be ignoring a duplicate key on JBM_DUAL... If you take a look on the sybase persistance.xml, http://anonsvn.jboss.org/repos/messaging/tags/JBossMessaging_1_4_0_CR2/sr... there is a SQLSTATE code for the duplicate key (DUPLICATE_KEY_STATE) ... maybe the code is different on sybase, on that case you should just replace by a valid code and you won't have the duplicate key exception any more. I have tested sybase, and I got successful runs, but maybe there is some problem with restarts. Please, let me know how it goes... and I will replace the valid DUPLICATE SQLSTATE on sybase at our SVN. Thanks View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4080164#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...