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java.lang.NullPointerException: 	at org.eclipse.smarthome.model.rule.runtime.internal.engine.RuleContextHelper.getContext(RuleContextHelper.java:64)	at org.eclipse.smarthome.model.rule.runtime.internal.engine.RuleEngineImpl.executeRule(RuleEngineImpl.java:304)	at org.eclipse.smarthome.model.rule.runtime.internal.engine.RuleEngineImpl.executeRules(RuleEngineImpl.java:321)	at org.eclipse.smarthome.model.rule.runtime.internal.engine.RuleEngineImpl.receiveCommand(RuleEngineImpl.java:222)	at org.eclipse.smarthome.core.items.events.AbstractItemEventSubscriber.receive(AbstractItemEventSubscriber.java:46)	at org.eclipse.smarthome.core.internal.events.OSGiEventManager$1.call(OSGiEventManager.java:192)	at org.eclipse.smarthome.core.internal.events.OSGiEventManager$1.call(OSGiEventManager.java:1)	at org.eclipse.smarthome.core.common.SafeMethodCaller$CallableWrapper.call(SafeMethodCaller.java:170)	at java.util.concurrent.FutureTask.run(FutureTask.java:266)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)	at java.lang.Thread.run(Thread.java:745)