java.lang.NullPointerException
	at org.jetbrains.plugins.grails.perspectives.graph.DomainClassesRelationsDataModel.getSourceNode(DomainClassesRelationsDataModel.java:90)
	at org.jetbrains.plugins.grails.perspectives.graph.DomainClassesRelationsDataModel.getSourceNode(DomainClassesRelationsDataModel.java:40)
	at com.intellij.openapi.graph.impl.builder.GraphBuilderImpl.createDataModel(GraphBuilderImpl.java:205)
	at com.intellij.openapi.graph.impl.builder.GraphBuilderImpl.buildModel(GraphBuilderImpl.java:72)
	at com.intellij.openapi.graph.impl.builder.GraphBuilderImpl.updateGraph(GraphBuilderImpl.java:261)
	at org.jetbrains.plugins.grails.perspectives.PerspectiveFileEditorComponent.reset(PerspectiveFileEditorComponent.java:113)
	at org.jetbrains.plugins.grails.perspectives.DomainClassesRelationsEditor.reset(DomainClassesRelationsEditor.java:75)
	at com.intellij.util.xml.ui.PerspectiveFileEditor.selectNotify(PerspectiveFileEditor.java:209)
	at com.intellij.openapi.fileEditor.impl.FileEditorManagerImpl.openFileImpl3(FileEditorManagerImpl.java:445)
	at com.intellij.openapi.fileEditor.impl.EditorTabbedContainer$MyTabbedPane$1.run(EditorTabbedContainer.java:3)
	at com.intellij.openapi.command.impl.CommandProcessorImpl.executeCommand(CommandProcessorImpl.java:103)
	at com.intellij.openapi.command.impl.CommandProcessorImpl.executeCommand(CommandProcessorImpl.java:89)
	at com.intellij.openapi.fileEditor.impl.EditorTabbedContainer$MyTabbedPane.setSelectedIndex(EditorTabbedContainer.java:42)
	at com.intellij.openapi.fileEditor.impl.EditorTabbedContainer$MyTabbedPane.processMouseEvent(EditorTabbedContainer.java:46)
	at java.awt.Component.processEvent(Component.java:5806)
	at java.awt.Container.processEvent(Container.java:2058)
	at java.awt.Component.dispatchEventImpl(Component.java:4413)
	at java.awt.Container.dispatchEventImpl(Container.java:2116)
	at java.awt.Component.dispatchEvent(Component.java:4243)
	at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4322)
	at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3986)
	at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3916)
	at java.awt.Container.dispatchEventImpl(Container.java:2102)
	at java.awt.Window.dispatchEventImpl(Window.java:2440)
	at java.awt.Component.dispatchEvent(Component.java:4243)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
	at com.intellij.ide.IdeEventQueue.c(IdeEventQueue.java:131)
	at com.intellij.ide.IdeEventQueue.b(IdeEventQueue.java:18)
	at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:136)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:173)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)