I have MS SQL server database & JBPM4, by using microsoft's JDBC drivers, i am getting exception while interacting with database.... But when using jTDS drivers, its quite fine and no errors. What it means, that is jBPM internally usingn jTDS drivers for MS SQL & can't work proper with MS drivers. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4251685#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...