java.lang.NullPointerException

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  • java.lang.NullPointerException at jetbrains.mps.nodeEditor.cellActions.CellAction_DeleteNode.getSiblingToSelect(CellAction_DeleteNode.java:82) at jetbrains.mps.nodeEditor.cellActions.CellAction_DeleteNode.execute(CellAction_DeleteNode.java:65) at jetbrains.mps.nodeEditor.actions.ActionHandlerImpl$1.doExecute(ActionHandlerImpl.java:56) at jetbrains.mps.editor.runtime.commands.EditorCommand.run(EditorCommand.java:52) at jetbrains.mps.smodel.WorkbenchModelAccess$CommandRunnable$1.run(WorkbenchModelAccess.java:642) at jetbrains.mps.smodel.WriteActionDispatcher.run(WriteActionDispatcher.java:39) at jetbrains.mps.smodel.WorkbenchModelAccess$3.run(WorkbenchModelAccess.java:135) at com.intellij.openapi.application.impl.ApplicationImpl.runWriteAction(ApplicationImpl.java:1010) at jetbrains.mps.smodel.WorkbenchModelAccess.runWriteAction(WorkbenchModelAccess.java:144) at jetbrains.mps.smodel.WorkbenchModelAccess$CommandRunnable.run(WorkbenchModelAccess.java:637) at com.intellij.openapi.command.impl.CoreCommandProcessor.executeCommand(CoreCommandProcessor.java:124) at com.intellij.openapi.command.impl.CoreCommandProcessor.executeCommand(CoreCommandProcessor.java:99) at jetbrains.mps.smodel.WorkbenchModelAccess.runWriteActionInCommand(WorkbenchModelAccess.java:450) at jetbrains.mps.smodel.WorkbenchModelAccess.executeCommand(WorkbenchModelAccess.java:413) at jetbrains.mps.project.ProjectModelAccess.executeCommand(ProjectModelAccess.java:43) at jetbrains.mps.nodeEditor.actions.ActionHandlerImpl.executeAction(ActionHandlerImpl.java:53) at jetbrains.mps.nodeEditor.actions.ActionHandlerImpl.executeAction(ActionHandlerImpl.java:43) at jetbrains.mps.nodeEditor.selection.EditorCellSelection.executeAction(EditorCellSelection.java:166) at jetbrains.mps.nodeEditor.selection.EditorCellLabelSelection.performDeleteAction(EditorCellLabelSelection.java:200) at jetbrains.mps.nodeEditor.selection.EditorCellLabelSelection.executeAction(EditorCellLabelSelection.java:165) at jetbrains.mps.ide.editor.actions.Backspace_Action.doExecute(Backspace_Action.java:55) at jetbrains.mps.workbench.action.BaseAction$2.run(BaseAction.java:145) at jetbrains.mps.workbench.action.BaseAction.actionPerformed(BaseAction.java:155) at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcher$3.performAction(IdeKeyEventDispatcher.java:595) at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcher.processAction(IdeKeyEventDispatcher.java:646) at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcher.inInitState(IdeKeyEventDispatcher.java:485) at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcher.dispatchKeyEvent(IdeKeyEventDispatcher.java:215) at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:622) at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:381) 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)
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