Troubles with jBpm 4 Timers

[aahmad]

Hello,

I'm a beginner with jBpm 4 RC 1 and have been having a lot of troublesgetting timers defined in my jpdl files to trigger at all. All of the examples I've tried from the net have not worked.

Below I'm including a simple jpdl file I am using for test as well as the exception I receive when creating a process instance:

<?xml version="1.0" encoding="UTF-8"?>

<process name="delayprocessing2" xmlns="http://jbpm.org/4.0/jpdl">
 <start g="272,38,80,40">
 <transition to="UpdateStatus"/>
 </start>

 <task name="UpdateStatus">
 <on event="timeout">
 <timer duedate="10 seconds" repeat="10 seconds">
 </timer>
 <event-listener class="sample.DelayedAssetCheckListener"/>
 </on>
 <transition to="found"/>
 </task>
 <end g="272,432,48,48" name="lost"/>
 <end g="457,338,48,48" name="found"/>
</process>

and here's the error:

Exception in thread "main" org.jbpm.api.JbpmException: unsuppported extension org.jbpm.jpdl.internal.model.JpdlExecution
 at org.jbpm.pvm.internal.model.ExecutionImpl.getExtension(ExecutionImpl.java:1021)
 at org.jbpm.jpdl.internal.activity.TaskActivity.execute(TaskActivity.java:48)
 at org.jbpm.pvm.internal.model.op.ExecuteActivity.perform(ExecuteActivity.java:57)
 at org.jbpm.pvm.internal.model.ExecutionImpl.performAtomicOperationSync(ExecutionImpl.java:589)
 at org.jbpm.pvm.internal.model.ExecutionImpl.performAtomicOperation(ExecutionImpl.java:562)
 at org.jbpm.pvm.internal.model.op.ProceedToDestination.perform(ProceedToDestination.java:56)
 at org.jbpm.pvm.internal.model.ExecutionImpl.performAtomicOperationSync(ExecutionImpl.java:589)
 at org.jbpm.pvm.internal.model.ExecutionImpl.performAtomicOperation(ExecutionImpl.java:562)
 at org.jbpm.pvm.internal.model.ExecutionImpl.start(ExecutionImpl.java:201)
 at org.jbpm.pvm.internal.cmd.StartProcessInstanceInLatestCmd.execute(StartProcessInstanceInLatestCmd.java:63)
 at org.jbpm.pvm.internal.cmd.StartProcessInstanceInLatestCmd.execute(StartProcessInstanceInLatestCmd.java:39)
 at org.jbpm.pvm.internal.svc.DefaultCommandService.execute(DefaultCommandService.java:42)
 at org.jbpm.pvm.internal.tx.StandardTransactionInterceptor.execute(StandardTransactionInterceptor.java:54)
 at org.jbpm.pvm.internal.svc.EnvironmentInterceptor.execute(EnvironmentInterceptor.java:54)
 at org.jbpm.pvm.internal.svc.RetryInterceptor.execute(RetryInterceptor.java:55)
 at org.jbpm.pvm.internal.svc.ExecutionServiceImpl.startProcessInstanceByKey(ExecutionServiceImpl.java:68)
 at jbpmsample.Driver.main(Driver.java:41)

I would really appreciate a knowledgeable person's help with this.