This exception has no message.

Stack trace

java.lang.IllegalStateException
	at ru.scratch.OpenScratchAction.projectFor(OpenScratchAction.java:39)
	at ru.scratch.OpenScratchListAction.actionPerformed(OpenScratchListAction.java:42)
	at com.intellij.openapi.actionSystem.impl.ActionMenuItem$ActionTransmitter$1.run(ActionMenuItem.java:242)
	at com.intellij.openapi.wm.impl.FocusManagerImpl.runOnOwnContext(FocusManagerImpl.java:668)
	at com.intellij.openapi.actionSystem.impl.ActionMenuItem$ActionTransmitter.actionPerformed(ActionMenuItem.java:228)
	at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2028)
	at com.intellij.openapi.actionSystem.impl.ActionMenuItem.fireActionPerformed(ActionMenuItem.java:92)
	at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2351)
	at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
	at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
	at javax.swing.AbstractButton.doClick(AbstractButton.java:389)
	at com.apple.laf.ScreenMenuItem.actionPerformed(ScreenMenuItem.java:95)
	at java.awt.MenuItem.processActionEvent(MenuItem.java:627)
	at java.awt.MenuItem.processEvent(MenuItem.java:586)
	at java.awt.MenuComponent.dispatchEventImpl(MenuComponent.java:337)
	at java.awt.MenuComponent.dispatchEvent(MenuComponent.java:325)
	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:682)
	at java.awt.EventQueue.access$000(EventQueue.java:85)
	at java.awt.EventQueue$1.run(EventQueue.java:638)
	at java.awt.EventQueue$1.run(EventQueue.java:636)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
	at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:98)
	at java.awt.EventQueue$2.run(EventQueue.java:652)
	at java.awt.EventQueue$2.run(EventQueue.java:650)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:649)
	at com.intellij.ide.IdeEventQueue.e(IdeEventQueue.java:662)
	at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:515)
	at com.intellij.ide.IdeEventQueue.b(IdeEventQueue.java:411)
	at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:369)
	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)