tmag [https://community.jboss.org/people/tmag] created the discussion "Any WorkflowProcessInstanceUpgrader working example" To view the discussion, visit: https://community.jboss.org/message/775187#775187 -------------------------------------------------------------- Anyone have a working example on WorkflowProcessInstanceUpgrader ? As per jBPM 5.3 documentation - when we tried +upgradeProcessInstance()  -+ + + * +     without a user transaction - its giving NullPointerException+ *Exception in thread "main" java.lang.NullPointerException* *    at org.jbpm.process.instance.impl.ProcessInstanceImpl.getProcess(ProcessInstanceImpl.java:68)* *    at org.jbpm.workflow.instance.WorkflowProcessInstanceUpgrader.upgradeProcessInstance(WorkflowProcessInstanceUpgrader.java:57)* *      Within a user transaction - its giving ClassCastException *java.lang.ClassCastException: org.drools.command.impl.CommandBasedStatefulKnowledgeSession cannot be cast to org.drools.common.InternalKnowledgeRuntime* *    at org.jbpm.workflow.instance.WorkflowProcessInstanceUpgrader.upgradeProcessInstance(WorkflowProcessInstanceUpgrader.java:61)* -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/775187#775187] Start a new discussion in jBPM at Community [https://community.jboss.org/choose-container!input.jspa?contentType=1&...]