nt2005 [https://community.jboss.org/people/nt2005] created the discussion "Serializable hates me!" To view the discussion, visit: https://community.jboss.org/message/648810#648810 -------------------------------------------------------------- Hey Guys, That is my line of codes I´m using, to start a process in an enventoriy: EntityManagerFactory emf = entityManager.getEntityManagerFactory();         TransactionManagerService tms = new TransactionManagerService();                         Environment env = KnowledgeBaseFactory.newEnvironment();         env.set(EnvironmentName.ENTITY_MANAGER_FACTORY, emf);         env.set(EnvironmentName.TRANSACTION_MANAGER, tms.getTransactionManager());                 // load up the knowledge base         KnowledgeBase kbase = readKnowledgeBase(processid);           StatefulKnowledgeSession ksession = JPAKnowledgeService.newStatefulKnowledgeSession(kbase, null, env);             //workitems           // hidden                     process = ksession.startProcess("de.toni.myprocess", params); The problem is, that all classes must implement java.io.Serializable. I got this problem at my own classes <- I can fix (implement Serializable) I got this problem at Buffered BufferedImage <- I can "fix", I use int[] instead I got this problem at  org.drools.persistence.jpa.processinstance.JPAWorkItemManager <- What The Hell??? I CANT FIX! I don´t use this class so jbpm use it... I´m a little bit angry about that, maybe someone can help me, please. ERROR [org.drools.persistence.SingleSessionCommandService] Could not commit session: java.lang.IllegalArgumentException: IOException while storing workItem 39: org.drools.persistence.jpa.processinstance.JPAWorkItemManager     at org.drools.persistence.info.WorkItemInfo.update(WorkItemInfo.java:129) [:5.3.1.Final]     at org.drools.persistence.jpa.processinstance.JPAWorkItemManager.internalExecuteWorkItem(JPAWorkItemManager.java:44) [:5.3.1.Final]     at org.jbpm.workflow.instance.node.WorkItemNodeInstance.internalTrigger(WorkItemNodeInstance.java:105) [:5.2.0.Final]     at org.jbpm.workflow.instance.impl.NodeInstanceImpl.trigger(NodeInstanceImpl.java:122) [:5.2.0.Final]     at org.jbpm.workflow.instance.impl.NodeInstanceImpl.triggerConnection(NodeInstanceImpl.java:185) [:5.2.0.Final]     at org.jbpm.workflow.instance.impl.NodeInstanceImpl.triggerCompleted(NodeInstanceImpl.java:150) [:5.2.0.Final]     ... -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/648810#648810] Start a new discussion in jBPM at Community [https://community.jboss.org/choose-container!input.jspa?contentType=1&...]