Handler code is: import org.apache.commons.logging.Log; | import org.apache.commons.logging.LogFactory; | import org.jbpm.graph.def.ProcessDefinition; | import org.jbpm.graph.exe.ExecutionContext; | import org.jbpm.graph.exe.ProcessInstance; | import org.jbpm.taskmgmt.def.AssignmentHandler; | import org.jbpm.taskmgmt.exe.Assignable; | | | | public class NewProcessHandler implements AssignmentHandler { | private static final long serialVersionUID = 1L; | | private final Log log = LogFactory.getLog(NewProcessHandler.class); | | public void assign(final Assignable assignable, final ExecutionContext executionContext) throws Exception { | final ProcessInstance pi = executionContext.getProcessInstance(); | final ProcessDefinition pd = executionContext.getProcessInstance().getProcessDefinition(); | log.info("New process started: " + pd + " version " + pd.getVersion() + " key:" + pi.getKey()); | // Starts process | executionContext.leaveNode(); | } The only bit of stack trace I have handy is this: anonymous wrote : org.jbpm.graph.def.DelegationException: com.xxx.bus.process.handler.NewProcessHandler | at org.jbpm.taskmgmt.exe.TaskMgmtInstance.performAssignment(TaskMgmtInstance.java:216) | at org.jbpm.taskmgmt.exe.TaskInstance.assign(TaskInstance.java:204) | at org.jbpm.taskmgmt.exe.TaskMgmtInstance.createTaskInstance(TaskMgmtInstance.java:154) | at org.jbpm.taskmgmt.exe.TaskMgmtInstance.createStartTaskInstance(TaskMgmtInstance.java:285) | at com.xxx.bus.process.ProcessManagerImpl$2.doInJbpm(ProcessManagerImpl.java:174) | at org.springmodules.workflow.jbpm31.JbpmTemplate.execute(JbpmTemplate.java:92) | at com.xxx.bus.process.ProcessManagerImpl.startProcess(ProcessManagerImpl.java:150) | The actual ClassCastException is thrown in TaskMgmtInstance.performAssignmentDelegation(): AssignmentHandler assignmentHandler = (AssignmentHandler) assignmentDelegation.instantiate(); View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4194049#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...