ERROR  openwfe.org.time.Scheduler Scheduler.java(trigger:494) 27.05.2008 11:30:41  trigger() exception occurred within scheduled job
java.lang.NullPointerException
	at openwfe.org.engine.impl.expool.SimpleExpressionPool.contentIterator(SimpleExpressionPool.java:957)
	at openwfe.org.engine.impl.expool.SimpleExpressionPool.reschedule(SimpleExpressionPool.java:1315)
	at openwfe.org.engine.impl.expool.SimpleExpressionPool.trigger(SimpleExpressionPool.java:1393)
	at openwfe.org.time.Scheduler$Entry.trigger(Scheduler.java:490)
	at openwfe.org.time.Scheduler.wakeup(Scheduler.java:461)
	at openwfe.org.time.Scheduler$SchedulerThread.run(Scheduler.java:577)