Scheduled publication throws error and does not publish document

• login author
• request publication in one hour
• logout
• login as editor
• deny request
• schedule publication in 5 minutes
• logout / wait

java.lang.ClassCastException: org.hippoecm.repository.jackrabbit.XAWorkspaceImpl cannot be cast to org.hippoecm.repository.api.HippoWorkspace
at org.hippoecm.repository.ocm.FieldManagerImpl.fetchStringField(FieldManagerImpl.java:594)
at org.jpox.state.AbstractStateManager.replacingStringField(AbstractStateManager.java:867)
at org.hippoecm.repository.reviewedactions.BasicReviewedActionsWorkflowImpl.jdoReplaceField(BasicReviewedActionsWorkflowImpl.java)
at org.hippoecm.repository.reviewedactions.FullReviewedActionsWorkflowImpl.jdoReplaceField(FullReviewedActionsWorkflowImpl.java)
at org.hippoecm.repository.reviewedactions.BasicReviewedActionsWorkflowImpl.jdoReplaceFields(BasicReviewedActionsWorkflowImpl.java)
at org.jpox.state.JDOStateManagerImpl.replaceFields(JDOStateManagerImpl.java:2545)
at org.jpox.state.JDOStateManagerImpl.replaceFields(JDOStateManagerImpl.java:2564)
at org.hippoecm.repository.ocm.StoreManagerImpl.fetchObject(StoreManagerImpl.java:242)
at org.jpox.state.JDOStateManagerImpl.validate(JDOStateManagerImpl.java:3844)
at org.jpox.ObjectManagerImpl.findObject(ObjectManagerImpl.java:1964)
at org.jpox.AbstractPersistenceManager.getObjectById(AbstractPersistenceManager.java:1479)
at org.jpox.AbstractPersistenceManager.getObjectById(AbstractPersistenceManager.java:1457)
at org.hippoecm.repository.impl.DocumentManagerImpl.getObject(DocumentManagerImpl.java:112)
at org.hippoecm.repository.impl.WorkflowManagerImpl.getWorkflow(WorkflowManagerImpl.java:309)
at org.hippoecm.repository.impl.WorkflowManagerImpl$WorkflowInvocationImpl.invoke(WorkflowManagerImpl.java:643)
at org.hippoecm.repository.quartz.WorkflowJob.execute(WorkflowJob.java:46)
at org.quartz.core.JobRunShell.run(JobRunShell.java:195)
at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:520)
13.01.2009 10:30:00 ERROR [org.quartz.core.JobRunShell.run():204] Job DEFAULT.e2079ae6-bcec-41fc-b869-7f3492eb3af7 threw an unhandled Exception:
java.lang.NullPointerException
at org.hippoecm.repository.impl.WorkflowManagerImpl.getWorkflow(WorkflowManagerImpl.java:317)
at org.hippoecm.repository.impl.WorkflowManagerImpl$WorkflowInvocationImpl.invoke(WorkflowManagerImpl.java:643)
at org.hippoecm.repository.quartz.WorkflowJob.execute(WorkflowJob.java:46)
at org.quartz.core.JobRunShell.run(JobRunShell.java:195)
at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:520)
13.01.2009 10:30:00 ERROR [org.quartz.core.ErrorLogger.schedulerError():2015] Job (DEFAULT.e2079ae6-bcec-41fc-b869-7f3492eb3af7 threw an exception.
org.quartz.SchedulerException: Job threw an unhandled exception. [See nested exception: java.lang.NullPointerException]
at org.quartz.core.JobRunShell.run(JobRunShell.java:206)
at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:520)

• Nested Exception (Underlying Cause) ---------------
  java.lang.NullPointerException
  at org.hippoecm.repository.impl.WorkflowManagerImpl.getWorkflow(WorkflowManagerImpl.java:317)
  at org.hippoecm.repository.impl.WorkflowManagerImpl$WorkflowInvocationImpl.invoke(WorkflowManagerImpl.java:643)
  at org.hippoecm.repository.quartz.WorkflowJob.execute(WorkflowJob.java:46)
  at org.quartz.core.JobRunShell.run(JobRunShell.java:195)
  at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:520)