java.lang.NullPointerException
   at java.io.File.<init>(File.java:277)
   at org.netbeans.modules.javascript.nodejs.platform.NodeJsSupport$PreferencesListener.startScriptChanged(NodeJsSupport.java:259)
   at org.netbeans.modules.javascript.nodejs.platform.NodeJsSupport$PreferencesListener$1.run(NodeJsSupport.java:202)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1443)
   at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:68)
   at org.openide.util.lookup.Lookups.executeWith(Lookups.java:303)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2058)