I define several process variable in process I found that if variable type is String value, the persistance in table jbpm_variableinstance is OK , I can read their value from the way as below codes. if variable type is other types, such as Boolean/List, the result is always null. Boolean type is in table jbpm_variableinstance is S type, same as String type variable, having T/F value. While List type is B type in table, having null value. Whats the problem? And how to save this kind of process varible. Thanks a lot. | ProcessInstance pi = jbpmContext.getProcessInstance(new Long("xxxx")); | String originator = (String)pi.getContextInstance().getVariable("originator"); | BooleanisDelegated = (Boolean)pi.getContextInstance().getVariable("isDelegated"); | List delegators = (List)pi.getContextInstance().getVariable("delegators"); | View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4199440#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...