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null argument:Realm cannot be null
org.eclipse.core.runtime.AssertionFailedException: null argument:Realm cannot be null at org.eclipse.core.runtime.Assert.isNotNull(Assert.java:85) at org.eclipse.core.databinding.observable.ChangeManager.<init>(ChangeManager.java:37) at org.eclipse.core.databinding.observable.AbstractObservable.<init>(AbstractObservable.java:29) at org.eclipse.core.databinding.observable.value.AbstractObservableValue.<init>(AbstractObservableValue.java:42) at org.eclipse.core.internal.databinding.property.value.SimplePropertyObservableValue.<init>(SimplePropertyObservableValue.java:50) at org.eclipse.core.databinding.property.value.SimpleValueProperty.observe(SimpleValueProperty.java:70) at org.eclipse.core.databinding.property.value.ValueProperty.observe(ValueProperty.java:107) at org.eclipse.emf.databinding.internal.EMFValuePropertyDecorator.observe(EMFValuePropertyDecorator.java:109) at org.eclipse.incquery.runtime.evm.specific.DefaultAttributeMonitor.observeAllAttributes(DefaultAttributeMonitor.java:94) at org.eclipse.incquery.runtime.evm.specific.DefaultAttributeMonitor.registerFor(DefaultAttributeMonitor.java:70) at org.eclipse.incquery.runtime.evm.api.RuleInstance$DefaultMatchAppearProcessor.activationMissing(RuleInstance.java:140) at org.eclipse.incquery.runtime.evm.api.RuleInstance$DefaultMatchEventProcessor.processMatchEvent(RuleInstance.java:102) at org.eclipse.incquery.runtime.evm.api.RuleInstance$DefaultMatchAppearProcessor.process(RuleInstance.java:147) at org.eclipse.incquery.runtime.api.MatchUpdateAdapter.notifyAppearance(MatchUpdateAdapter.java:91) at org.eclipse.incquery.runtime.internal.boundary.CallbackNode.update(CallbackNode.java:43) at org.eclipse.incquery.runtime.rete.network.ReteContainer.messageConsumptionSingleThreaded(ReteContainer.java:457) at org.eclipse.incquery.runtime.rete.network.Network.waitForReteTermination(Network.java:312) at org.eclipse.incquery.runtime.rete.network.ReteContainer.flushUpdates(ReteContainer.java:335) at org.eclipse.incquery.runtime.rete.network.ReteContainer.connectAndSynchronize(ReteContainer.java:173) at org.eclipse.incquery.runtime.rete.matcher.RetePatternMatcher.connect(RetePatternMatcher.java:134) at org.eclipse.incquery.runtime.rete.matcher.RetePatternMatcher.connect(RetePatternMatcher.java:155) at org.eclipse.incquery.runtime.api.impl.BaseMatcher.addCallbackOnMatchUpdate(BaseMatcher.java:313) at org.eclipse.incquery.runtime.evm.specific.rule.SimpleMatcherRuleInstance.prepareInstance(SimpleMatcherRuleInstance.java:45) at org.eclipse.incquery.runtime.evm.specific.rule.SimpleMatcherRuleSpecification.instantiateRule(SimpleMatcherRuleSpecification.java:73) at org.eclipse.incquery.runtime.evm.api.RuleBase.internalInstantiateRule(RuleBase.java:86) at org.eclipse.incquery.runtime.evm.api.RuleBase.instantiateRule(RuleBase.java:78) at org.eclipse.incquery.runtime.evm.api.RuleEngine.internalAddRule(RuleEngine.java:201) at org.eclipse.incquery.runtime.evm.api.RuleEngine.addRule(RuleEngine.java:179)