Java.lang.NullPointerException: When Get the PDF File Name

Hi,
i try to follow the blog on <b>Handling FileUpload and FileDownload in NetWeaver Developer Studio(NWDS) 2004S</b> on /people/rekha.malavathu2/blog/2006/12/12/handling-fileupload-and-filedownload-in-netweaver-developer-studionwds-2004s
as i create a fileupload and i wish to get the file name and the pdf, then i to run and deploy it but i get <b>java.lang.NullPointerException</b>
the code are as below when i click on send email button
IPrivateEmail.IFileUploadNodeNode node = wdContext.nodeFileUploadNode();
IPrivateEmail.IFileUploadNodeElement fileUploadEle = node.createFileUploadNodeElement();
     try{
     IWDResource resource = WDResourceFactory.createResource(wdContext.currentContextElement().getFileUploadUI().read(true), wdContext.currentContextElement().getFileUploadUI().getResourceName(), WDWebResourceType.PDF, true);
     fileUploadEle.setFileUploadAttr(resource);
     fileUploadEle.setFileUploadName(wdContext.currentContextElement().getFileUploadUI().getResourceName());
     node.addElement(fileUploadEle);
     }catch(Exception e){
     wdComponentAPI.getMessageManager().reportSuccess("ERROR"+e.getMessage());
but i wonder which part of the code i did wrongly.. as i wish to insert into my send email code
Properties props = new Properties();
          String host = "SMTP HOST";
          props.put("mail.smtp.host", host);
          Session session = Session.getInstance(props, null);
          MimeMessage message = new MimeMessage(session);
          Address toAddress = new InternetAddress();
          Address fromAddress = new InternetAddress();
          Address ccAddress = new InternetAddress();
          Address bccAddress = new InternetAddress();
          try
               MimeMultipart multipart = new MimeMultipart();
               BodyPart messageBodyPart = new MimeBodyPart();
               if (! wdContext.currentEmailElement().getFrom().equals(""))
                    fromAddress = new InternetAddress(wdContext.currentEmailElement().getFrom());
                    message.setFrom(fromAddress);
               if (! wdContext.currentEmailElement().getTo().equals(""))
                    toAddress = new InternetAddress(wdContext.currentEmailElement().getTo());
                    message.setRecipient(Message.RecipientType.TO, toAddress);
               if (! wdContext.currentEmailElement().getCc().equals(""))
                    ccAddress = new InternetAddress(wdContext.currentEmailElement().getCc());
                    message.setRecipient(Message.RecipientType.CC, ccAddress);
               if (! wdContext.currentEmailElement().getBcc().equals(""))
                    bccAddress = new InternetAddress(wdContext.currentEmailElement().getBcc());
                    message.setRecipient(Message.RecipientType.BCC, bccAddress);
               if (! wdContext.currentEmailElement().getSubject().equals(""))
                    message.setSubject(wdContext.currentEmailElement().getSubject());
               if (! wdContext.currentEmailElement().getBody().equals(""))
                    messageBodyPart.setText(wdContext.currentEmailElement().getBody());
               multipart.addBodyPart(messageBodyPart);
               messageBodyPart = new MimeBodyPart();
               String filename = IWDResource.getResourceName();
               DataSource source = new FileDataSource(filename);
               messageBodyPart.setDataHandler(new DataHandler(source));
               messageBodyPart.setFileName(source.getName());
               messageBodyPart.setHeader("Content-Type","application/pdf");
               multipart.addBodyPart(messageBodyPart);
               message.setContent(multipart);
               Transport.send(message);
          catch (AddressException e)
               wdComponentAPI.getMessageManager().reportWarning(e.getLocalizedMessage());
               e.printStackTrace();
          catch (SendFailedException e)
               wdComponentAPI.getMessageManager().reportWarning(e.getLocalizedMessage());
               e.printStackTrace();
          catch (MessagingException e)
               wdComponentAPI.getMessageManager().reportWarning(e.getLocalizedMessage());
               e.printStackTrace();
so i wonder could anyone help me out.. as i need to get the pdf filename order to put into the variable call <b>filename</b> at the send mail code.
below is the error message
java.lang.NullPointerException
     at com.sap.example.uploademail.Email.wdDoInit(Email.java:124)
     at com.sap.example.uploademail.wdp.InternalEmail.wdDoInit(InternalEmail.java:146)
     at com.sap.tc.webdynpro.progmodel.generation.DelegatingView.doInit(DelegatingView.java:61)
     at com.sap.tc.webdynpro.progmodel.controller.Controller.initController(Controller.java:215)
     at com.sap.tc.webdynpro.progmodel.view.View.initController(View.java:445)
     at com.sap.tc.webdynpro.progmodel.controller.Controller.init(Controller.java:200)
     at com.sap.tc.webdynpro.progmodel.view.ViewManager.getView(ViewManager.java:709)
     at com.sap.tc.webdynpro.progmodel.view.ViewManager.bindRoot(ViewManager.java:579)
     at com.sap.tc.webdynpro.progmodel.view.ViewManager.init(ViewManager.java:155)
     at com.sap.tc.webdynpro.clientserver.window.WebDynproWindow.doOpen(WebDynproWindow.java:295)
     at com.sap.tc.webdynpro.clientserver.window.ApplicationWindow.show(ApplicationWindow.java:183)
     at com.sap.tc.webdynpro.clientserver.window.ApplicationWindow.open(ApplicationWindow.java:178)
     at com.sap.tc.webdynpro.clientserver.cal.ClientApplication.init(ClientApplication.java:364)
     at com.sap.tc.webdynpro.clientserver.session.ApplicationSession.initApplication(ApplicationSession.java:748)
     at com.sap.tc.webdynpro.clientserver.session.ApplicationSession.doProcessing(ApplicationSession.java:283)
     at com.sap.tc.webdynpro.clientserver.session.ClientSession.doApplicationProcessingStandalone(ClientSession.java:759)
     at com.sap.tc.webdynpro.clientserver.session.ClientSession.doApplicationProcessing(ClientSession.java:712)
     at com.sap.tc.webdynpro.clientserver.session.ClientSession.doProcessing(ClientSession.java:261)
     at com.sap.tc.webdynpro.clientserver.session.RequestManager.doProcessing(RequestManager.java:149)
     at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doContent(DispatcherServlet.java:62)
     at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doGet(DispatcherServlet.java:46)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.runServlet(HttpHandlerImpl.java:401)
     at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.handleRequest(HttpHandlerImpl.java:266)
     at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:387)
     at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:365)
     at com.sap.engine.services.httpserver.server.RequestAnalizer.invokeWebContainer(RequestAnalizer.java:944)
     at com.sap.engine.services.httpserver.server.RequestAnalizer.handle(RequestAnalizer.java:266)
     at com.sap.engine.services.httpserver.server.Client.handle(Client.java:95)
     at com.sap.engine.services.httpserver.server.Processor.request(Processor.java:175)
     at com.sap.engine.core.service630.context.cluster.session.ApplicationSessionMessageListener.process(ApplicationSessionMessageListener.java:33)
     at com.sap.engine.core.cluster.impl6.session.MessageRunner.run(MessageRunner.java:41)
     at com.sap.engine.core.thread.impl3.ActionObject.run(ActionObject.java:37)
     at java.security.AccessController.doPrivileged(Native Method)
     at com.sap.engine.core.thread.impl3.SingleThread.execute(SingleThread.java:100)
     at com.sap.engine.core.thread.impl3.SingleThread.run(SingleThread.java:170)

facing same issue.
jdev 10.1.3.3.0, on expanding the database connection, I get a null pointer exception.
On the testing the connection it says 'success' though.
any inputs ?

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