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java.lang.NullPointerException: 	at org.osate.ge.internal.services.impl.DefaultReferenceBuilderService$ContextFunction.deactivate(DefaultReferenceBuilderService.java:47)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)	at java.lang.reflect.Method.invoke(Unknown Source)	at org.eclipse.equinox.internal.ds.model.ServiceComponent.deactivate(ServiceComponent.java:363)	at org.eclipse.equinox.internal.ds.model.ServiceComponentProp.deactivate(ServiceComponentProp.java:161)	at org.eclipse.equinox.internal.ds.model.ServiceComponentProp.dispose(ServiceComponentProp.java:387)	at org.eclipse.equinox.internal.ds.model.ServiceComponentProp.dispose(ServiceComponentProp.java:102)	at org.eclipse.equinox.internal.ds.InstanceProcess.disposeInstances(InstanceProcess.java:366)	at org.eclipse.equinox.internal.ds.InstanceProcess.disposeInstances(InstanceProcess.java:306)	at org.eclipse.equinox.internal.ds.Resolver.disposeComponentConfigs(Resolver.java:724)	at org.eclipse.equinox.internal.ds.Resolver.disableComponents(Resolver.java:700)	at org.eclipse.equinox.internal.ds.SCRManager.stoppingBundle(SCRManager.java:554)	at org.eclipse.equinox.internal.ds.SCRManager.bundleChanged(SCRManager.java:233)	at org.eclipse.osgi.internal.framework.BundleContextImpl.dispatchEvent(BundleContextImpl.java:902)	at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230)	at org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:148)	at org.eclipse.osgi.internal.framework.EquinoxEventPublisher.publishBundleEventPrivileged(EquinoxEventPublisher.java:165)	at org.eclipse.osgi.internal.framework.EquinoxEventPublisher.publishBundleEvent(EquinoxEventPublisher.java:75)	at org.eclipse.osgi.internal.framework.EquinoxEventPublisher.publishBundleEvent(EquinoxEventPublisher.java:67)	at org.eclipse.osgi.internal.framework.EquinoxContainerAdaptor.publishModuleEvent(EquinoxContainerAdaptor.java:102)	at org.eclipse.osgi.container.Module.publishEvent(Module.java:466)	at org.eclipse.osgi.container.Module.doStop(Module.java:624)	at org.eclipse.osgi.container.Module.stop(Module.java:488)	at org.eclipse.osgi.container.ModuleContainer$ContainerStartLevel.decStartLevel(ModuleContainer.java:1623)	at org.eclipse.osgi.container.ModuleContainer$ContainerStartLevel.doContainerStartLevel(ModuleContainer.java:1542)	at org.eclipse.osgi.container.SystemModule.stopWorker(SystemModule.java:248)	at org.eclipse.osgi.internal.framework.EquinoxBundle$SystemBundle$EquinoxSystemModule.stopWorker(EquinoxBundle.java:144)	at org.eclipse.osgi.container.Module.doStop(Module.java:626)	at org.eclipse.osgi.container.Module.stop(Module.java:488)	at org.eclipse.osgi.container.SystemModule.stop(SystemModule.java:186)	at org.eclipse.osgi.internal.framework.EquinoxBundle$SystemBundle$EquinoxSystemModule$1.run(EquinoxBundle.java:159)	at java.lang.Thread.run(Unknown Source)