#3 Error generating Javadoc in IDEA 8.1

[Don Smith]

Error during dispatching of java.awt.event.InvocationEvent[INVOCATION_DEFAULT,runnable=com.intellij.ui.popup.PopupFactoryImpl$ActionPopupStep$1@760c79,notifier=null,catchExceptions=false,when=1236204586371] on sun.awt.X11.XToolkit@5bdbdc: com.intellij.psi.PsiManager.getElementFactory()Lcom/intellij/psi/PsiElementFactory;
java.lang.NoSuchMethodError: com.intellij.psi.PsiManager.getElementFactory()Lcom/intellij/psi/PsiElementFactory;
at nl.piraya.ideadoc.JavadocInserter.handleClass(JavadocInserter.java:214)
at nl.piraya.ideadoc.JavadocInserter.run(JavadocInserter.java:151)
at com.intellij.openapi.application.impl.ApplicationImpl.runWriteAction(ApplicationImpl.java:171)
at nl.piraya.ideadoc.WriteActionRunner.run(WriteActionRunner.java:52)
at com.intellij.openapi.command.impl.CommandProcessorImpl.executeCommand(CommandProcessorImpl.java:2)
at com.intellij.openapi.command.impl.CommandProcessorImpl.executeCommand(CommandProcessorImpl.java:100)
at com.intellij.openapi.command.impl.CommandProcessorImpl.executeCommand(CommandProcessorImpl.java:52)
at nl.piraya.ideadoc.JavadocAction.actionPerformed(JavadocAction.java:49)
at com.intellij.ui.popup.PopupFactoryImpl$ActionPopupStep$1.run(PopupFactoryImpl.java)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
at com.intellij.ide.IdeEventQueue.c(IdeEventQueue.java:35)
at com.intellij.ide.IdeEventQueue.b(IdeEventQueue.java:99)
at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:217)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)