User development, A new message was posted in the thread "Problem Signaling a Waiting Execution": http://community.jboss.org/message/520950#520950 Author : Andy Barreras Profile : http://community.jboss.org/people/FlyNavy Message: -------------------------------------------------------------- Ronald,   I think you are on to something.  Here's the issue.  I have a Process Definition with 8 steps (i.e activities) in it (Activity1 through Activity8).  Each step is a state.  When I create a instance of the Process Definition, I get the exception because programatically, the API only recognizes the first activity (state) so when I signal the ProcessEngine to advance, there is nothing to advance to.  Here's how I tested it where's as the  executionListener variable is an instance to the EventListenerExecution that is passed as an argument in my Listener class:           System.out.println("CURRENT EXECUTION NAME: " + executionListener.getName());         System.out.println("CURRENT EXECUTION ID: " + executionListener.getId());         System.out.println("CURRENT EXECUTION KEY: " + executionListener.getKey());         System.out.println("CURRENT EXECUTION STATE: " + executionListener.getState());         System.out.println("CURRENT EXECUTION PRIORITY: " + executionListener.getPriority());         System.out.println("IS PROCESS INSTANCE: " + executionListener.getIsProcessInstance());                 Set<String> s = executionListener.findActiveActivityNames();         Iterator<String> i = s.iterator();                 while(i.hasNext()) {             String activity = i.next();             System.out.println("ACTIVITY NAME IN SET [CURRENT]: " + activity);         }   Outputs:   1. I know the ExecutionListener is a ProcessInstance since the  executionListener.getIsProcessInstance()returns 'true' 2.  There is only one activity (Activity1) in the Set that is returned from executionListener.findActiveActivityNames()method even though (as you can see in the JPDL code below), there are 8 activities.   JPDL code:   <?xml version="1.0" encoding="UTF-8"?> <process name="Simple Activity Scheduling" xmlns="http://jbpm.org/4.0/jpdl">    <start g="188,25,48,48" name="start">       <transition g="-110,-11" name="to Activity1" to="Activity1"/>    </start>    <state g="137,123,150,52" name="Activity1">         <on event="end">         <event-listener class="my.package.MyListener1"/>         </on>       <transition name="to Activity2" to="Activity2" g="-138,-18"/>    </state>       <state g="137,220,152,52" name="Activity2">         <on event="end">         <event-listener class="my.package.MyListener2"/>         </on>       <transition name="to Activity3" to="Activity3" g="-153,-18"/>    </state>    <state g="128,322,170,52" name="Activity3">         <on event="end">         <event-listener class="my.package.MyListener3"/>         </on>       <transition name="to Activity4" to="Activity4" g="-129,-18"/>    </state>    <state g="141,420,142,52" name="Activity4">         <on event="end">         <event-listener class="my.package.MyListener4"/>         </on>       <transition name="to Activity5" to="Activity5" g="-150,-18"/>    </state>    <state g="129,527,168,52" name="Activity5">         <on event="end">         <event-listener class="my.package.MyListener5"/>         </on>       <transition name="to Activity6" to="Activity6" g="-137,-18"/>    </state>    <state g="127,632,170,52" name="Activity6">         <on event="end">         <event-listener class="my.package.MyListener6"/>         </on>       <transition name="to Activity7" to="Activity7" g="-46,-18"/>    </state>    <state g="165,739,92,52" name="Activity7">         <on event="end">         <event-listener class="my.package.MyListener7"/>         </on>       <transition name="to Activity8" to="Activity8" g="-130,-18"/>    </state>    <state g="142,846,139,52" name="Activity8">         <on event="end">         <event-listener class="my.package.MyListener8"/>         </on>       <transition name="to end" to="end" g="-36,-18"/>    </state>    <end g="651,849,48,48" name="end"/> </process> -------------------------------------------------------------- To reply to this message visit the message page: http://community.jboss.org/message/520950#520950