"Exception in plugin Android Support." when trying to open an xml layout file

AS_0.2.13_exception

java.lang.NullPointerException
	at com.android.tools.idea.configurations.ConfigurationManager.getTargets(ConfigurationManager.java:232)
	at com.android.tools.idea.configurations.ConfigurationManager.getDefaultTarget(ConfigurationManager.java:315)
	at com.android.tools.idea.configurations.ConfigurationManager.getTarget(ConfigurationManager.java:380)
	at com.android.tools.idea.configurations.Configuration.getTarget(Configuration.java:476)
	at com.android.tools.idea.configurations.TargetMenuAction.updatePresentation(TargetMenuAction.java:51)
	at com.android.tools.idea.configurations.TargetMenuAction.<init>(TargetMenuAction.java:38)
	at com.android.tools.idea.configurations.ConfigurationToolBar.createActions(ConfigurationToolBar.java:89)
	at com.intellij.android.designer.designSurface.AndroidDesignerEditorPanel.addConfigurationActions(AndroidDesignerEditorPanel.java:218)
	at com.intellij.android.designer.designSurface.AndroidDesignerEditorPanel.addActions(AndroidDesignerEditorPanel.java:189)
	at com.intellij.android.designer.designSurface.AndroidDesignerEditorPanel.<init>(AndroidDesignerEditorPanel.java:175)
	at com.intellij.android.designer.AndroidDesignerEditor.createDesignerPanel(AndroidDesignerEditor.java:63)
	at com.intellij.designer.DesignerEditor.<init>(DesignerEditor.java:50)
	at com.intellij.android.designer.AndroidDesignerEditor.<init>(AndroidDesignerEditor.java:41)
	at com.intellij.android.designer.AndroidDesignerEditorProvider.createEditor(AndroidDesignerEditorProvider.java:60)
	at com.intellij.openapi.fileEditor.impl.FileEditorManagerImpl.openFileImpl4(FileEditorManagerImpl.java:808)
	at com.intellij.openapi.fileEditor.impl.FileEditorManagerImpl.openFileImpl3(FileEditorManagerImpl.java:749)
	at com.intellij.openapi.fileEditor.impl.FileEditorManagerImpl$9.run(FileEditorManagerImpl.java:729)
	at com.intellij.openapi.command.impl.CommandProcessorImpl.executeCommand(CommandProcessorImpl.java:117)
	at com.intellij.openapi.command.impl.CommandProcessorImpl.executeCommand(CommandProcessorImpl.java:99)
	at com.intellij.openapi.command.impl.CommandProcessorImpl.executeCommand(CommandProcessorImpl.java:85)
	at com.intellij.openapi.fileEditor.impl.FileEditorManagerImpl.openFileImpl2(FileEditorManagerImpl.java:726)
	at com.intellij.openapi.fileEditor.impl.FileEditorManagerImpl.openFileWithProviders(FileEditorManagerImpl.java:663)
	at com.intellij.openapi.fileEditor.ex.FileEditorManagerEx.openFile(FileEditorManagerEx.java:139)
	at com.intellij.openapi.fileEditor.impl.FileEditorManagerImpl$15.run(FileEditorManagerImpl.java:1057)
	at com.intellij.openapi.command.impl.CommandProcessorImpl.executeCommand(CommandProcessorImpl.java:124)
	at com.intellij.openapi.command.impl.CommandProcessorImpl.executeCommand(CommandProcessorImpl.java:99)
	at com.intellij.openapi.command.impl.CommandProcessorImpl.executeCommand(CommandProcessorImpl.java:85)
	at com.intellij.openapi.fileEditor.impl.FileEditorManagerImpl.openEditor(FileEditorManagerImpl.java:1053)
	at com.intellij.openapi.fileEditor.OpenFileDescriptor.navigateInAnyFileEditor(OpenFileDescriptor.java:148)
	at com.intellij.openapi.fileEditor.OpenFileDescriptor.navigateInEditor(OpenFileDescriptor.java:134)
	at com.intellij.openapi.fileEditor.OpenFileDescriptor.navigate(OpenFileDescriptor.java:121)
	at com.intellij.ide.actions.GotoFileAction$1$1.run(GotoFileAction.java:82)
	at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.run(LaterInvocator.java:347)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:715)
	at java.awt.EventQueue.access$400(EventQueue.java:82)
	at java.awt.EventQueue$2.run(EventQueue.java:676)
	at java.awt.EventQueue$2.run(EventQueue.java:674)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:86)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:685)
	at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:696)
	at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:524)
	at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:335)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:296)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:211)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:201)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:196)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:188)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)

tambien me pasa lo mismo