java.lang.NullPointerException
        at org.jymc.jpydbgfornetbeans.debugger.Utils.getDocumentSource(Utils.java:306)
        at org.jymc.jpydbgfornetbeans.config.NetBeansFrontend.getBufferPath(NetBeansFrontend.java:377)
        at org.jymc.jpydebug.jedit.JythonTreeNode.<init>(JythonTreeNode.java:39)
        at org.jymc.jpydebug.jedit.JpyDbgNavigator.populateTree(JpyDbgNavigator.java:297)
        at org.jymc.jpydebug.jedit.JpyDbgNavigator.populateCurrent(JpyDbgNavigator.java:385)
        at org.jymc.jpydebug.jedit.JpyDbgNavigator.initialTreePanelInit(JpyDbgNavigator.java:346)
        at org.jymc.jpydbgfornetbeans.navigator.PythonNavigatorContent$_INSPECTOR_LOADER_.run(PythonNavigatorContent.java:136)
        at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:561)
        at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:986)