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java.lang.NullPointerException: 	at jetbrains.mps.util.NameUtil.getModelLongName(NameUtil.java:372)	at jetbrains.mps.util.SNodeOperations.getModelLongName(SNodeOperations.java:334)	at jetbrains.mps.baseLanguage.scopes.ClassifierResolveUtils.resolveClassifierByFqName(ClassifierResolveUtils.java:187)	at jetbrains.mps.baseLanguage.scopes.ClassifierResolveUtils.resolveNonSpecialSyntax(ClassifierResolveUtils.java:70)	at jetbrains.mps.baseLanguage.scopes.ClassifierResolveUtils.resolve(ClassifierResolveUtils.java:304)	at jetbrains.mps.baseLanguage.scopes.ClassifiersScope.resolve(ClassifiersScope.java:54)	at jetbrains.mps.scope.DelegatingScope.resolve(DelegatingScope.java:26)	at jetbrains.mps.scope.FilteringScope.resolve(FilteringScope.java:22)	at jetbrains.mps.resolve.ScopeResolver$1.compute(ScopeResolver.java:47)	at jetbrains.mps.resolve.ScopeResolver$1.compute(ScopeResolver.java:35)	at jetbrains.mps.typesystem.inference.TypeContextManager.runTypecheckingAction(TypeContextManager.java:240)	at jetbrains.mps.typesystem.inference.TypeContextManager.runResolveAction(TypeContextManager.java:218)	at jetbrains.mps.resolve.ScopeResolver.resolve(ScopeResolver.java:35)	at jetbrains.mps.resolve.ResolverComponent.resolveScopesOnly(ResolverComponent.java:88)	at jetbrains.mps.nodeEditor.cellActions.CellAction_PasteNode$1$1.run(CellAction_PasteNode.java:136)	at jetbrains.mps.ide.smodel.WorkbenchModelAccess$CommandRunnable$1.run(WorkbenchModelAccess.java:831)	at jetbrains.mps.ide.smodel.WorkbenchModelAccess.runWriteAction(WorkbenchModelAccess.java:148)	at jetbrains.mps.ide.smodel.WorkbenchModelAccess$CommandRunnable.run(WorkbenchModelAccess.java:826)	at jetbrains.mps.ide.smodel.WorkbenchModelAccess$12.run(WorkbenchModelAccess.java:534)	at jetbrains.mps.ide.smodel.WorkbenchModelAccess$TryWriteActionRunnable$1.run(WorkbenchModelAccess.java:885)	at com.intellij.openapi.application.impl.ApplicationImpl.runWriteAction(ApplicationImpl.java:1013)	at jetbrains.mps.ide.smodel.WorkbenchModelAccess$TryWriteActionRunnable.run(WorkbenchModelAccess.java:881)	at com.intellij.openapi.command.impl.CommandProcessorImpl.executeCommand(CommandProcessorImpl.java:124)	at com.intellij.openapi.command.impl.CommandProcessorImpl.executeCommand(CommandProcessorImpl.java:99)	at jetbrains.mps.ide.smodel.WorkbenchModelAccess.tryWriteInCommand(WorkbenchModelAccess.java:546)	at jetbrains.mps.ide.smodel.EDTExecutor$3.tryRun(EDTExecutor.java:100)	at jetbrains.mps.ide.smodel.EDTExecutor$Executor.worker(EDTExecutor.java:194)	at jetbrains.mps.ide.smodel.EDTExecutor$Executor.access$300(EDTExecutor.java:130)	at jetbrains.mps.ide.smodel.EDTExecutor$Executor$1.run(EDTExecutor.java:136)	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:641)	at java.awt.EventQueue.access$000(EventQueue.java:84)	at java.awt.EventQueue$1.run(EventQueue.java:602)	at java.awt.EventQueue$1.run(EventQueue.java:600)	at java.security.AccessController.doPrivileged(Native Method)	at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)	at java.awt.EventQueue.dispatchEvent(EventQueue.java:611)	at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:686)	at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:511)	at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:334)	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)	at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)