If you store these three variables as strings instead of RegistrationInfo this task would be really simple. (You could create a RegistrationInfo from the strings where needed.) In table jbpm_variableinstance you see that date, long, double, and strings are handled specially, very simple to access. All other serialized variables are put into jbpm_bytearray/byteblock i.e. essentially stored as a blob. Volker View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4222904#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...