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java.lang.NullPointerException: 	at jetbrains.mps.ide.platform.actions.core.RefactoringProcessor$6.run(RefactoringProcessor.java:266)	at jetbrains.mps.ide.migration.MigrationComponent$RefactoringSessionTaskQueue.runAll(MigrationComponent.java:198)	at jetbrains.mps.ide.migration.MigrationComponent.executeRefactoringLog(MigrationComponent.java:320)	at jetbrains.mps.ide.migration.RefactoringLogApplied.execute(RefactoringLogApplied.java:73)	at jetbrains.mps.ide.migration.MigrationManagerImpl$10$1$1$1.run(MigrationManagerImpl.java:228)	at jetbrains.mps.smodel.WorkbenchModelAccess$CommandRunnable$1.run(WorkbenchModelAccess.java:632)	at jetbrains.mps.smodel.WriteActionDispatcher.run(WriteActionDispatcher.java:39)	at jetbrains.mps.smodel.WorkbenchModelAccess$3.run(WorkbenchModelAccess.java:136)	at com.intellij.openapi.application.impl.ApplicationImpl.runWriteAction(ApplicationImpl.java:905)	at jetbrains.mps.smodel.WorkbenchModelAccess.runWriteAction(WorkbenchModelAccess.java:145)	at jetbrains.mps.smodel.WorkbenchModelAccess$CommandRunnable.run(WorkbenchModelAccess.java:627)	at com.intellij.openapi.command.impl.CoreCommandProcessor.executeCommand(CoreCommandProcessor.java:129)	at com.intellij.openapi.command.impl.CoreCommandProcessor.executeCommand(CoreCommandProcessor.java:100)	at jetbrains.mps.smodel.WorkbenchModelAccess.runWriteActionInCommand(WorkbenchModelAccess.java:440)	at jetbrains.mps.smodel.WorkbenchModelAccess.executeCommand(WorkbenchModelAccess.java:403)	at jetbrains.mps.project.ProjectModelAccess.executeCommand(ProjectModelAccess.java:43)	at jetbrains.mps.ide.migration.MigrationManagerImpl$10$1$1.execute(MigrationManagerImpl.java:226)	at jetbrains.mps.ide.migration.wizard.MigrationsProgressWizardStep$9.run(MigrationsProgressWizardStep.java:269)	at com.intellij.openapi.application.impl.LaterInvocator$1.run(LaterInvocator.java:156)	at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.runNextEvent(LaterInvocator.java:326)	at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.run(LaterInvocator.java:310)	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:756)	at java.awt.EventQueue.access$500(EventQueue.java:97)	at java.awt.EventQueue$3.run(EventQueue.java:709)	at java.awt.EventQueue$3.run(EventQueue.java:703)	at java.security.AccessController.doPrivileged(Native Method)	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)	at java.awt.EventQueue.dispatchEvent(EventQueue.java:726)	at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:863)	at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:699)	at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:385)	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:109)	at java.awt.WaitDispatchSupport$2.run(WaitDispatchSupport.java:184)	at java.awt.WaitDispatchSupport$4.run(WaitDispatchSupport.java:229)	at java.awt.WaitDispatchSupport$4.run(WaitDispatchSupport.java:227)	at java.security.AccessController.doPrivileged(Native Method)	at java.awt.WaitDispatchSupport.enter(WaitDispatchSupport.java:227)	at java.awt.Dialog.show(Dialog.java:1084)	at com.intellij.openapi.ui.impl.DialogWrapperPeerImpl$MyDialog.show(DialogWrapperPeerImpl.java:777)	at com.intellij.openapi.ui.impl.DialogWrapperPeerImpl.show(DialogWrapperPeerImpl.java:454)	at com.intellij.openapi.ui.DialogWrapper.invokeShow(DialogWrapper.java:1665)	at com.intellij.openapi.ui.DialogWrapper.show(DialogWrapper.java:1607)	at com.intellij.openapi.ui.DialogWrapper.showAndGet(DialogWrapper.java:1622)	at jetbrains.mps.ide.migration.MigrationTrigger$1$2.run(MigrationTrigger.java:133)	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:756)	at java.awt.EventQueue.access$500(EventQueue.java:97)	at java.awt.EventQueue$3.run(EventQueue.java:709)	at java.awt.EventQueue$3.run(EventQueue.java:703)	at java.security.AccessController.doPrivileged(Native Method)	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)	at java.awt.EventQueue.dispatchEvent(EventQueue.java:726)	at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:863)	at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:699)	at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:385)	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)	at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)