I am trying to use an upload program to upload my files. The code that I use is 

```
app.post('/photos',loadUser, function(req, res) {
  var post = new Post();
  req.form.complete(function(err, fields, files) {
    if(err) {
      console.log(err);
      next(err);
    } else {
      ins = fs.createReadStream(files.file.path);
      ous = fs.createWriteStream(__dirname + '/public/uploads/photos/' + files.file.filename);
      post.filename=files.file.filename;
      post.file=files.file.path;
      util.pump(ins, ous, function(err) {
        if(err) {
          next(err);
        } else {
          post.save(function(err,docs) { 
        req.flash('info', 'information  Saved');
            res.redirect('/photos');
          });
        }
      });
    }
  });
});

```

When I remove loadUser method everything is working fine, but when I use the `loadUser` method it is giving me an error. The console information of the error is:

```
Error: parser error, 0 of 4344 bytes parsed
at IncomingForm.write (/home/darhamid/node_modules/formidable/lib/incoming_form.js:141:17)
at IncomingMessage.<anonymous> (/home/darhamid/node_modules/formidable/lib/incoming_form.js:91:12)
at IncomingMessage.emit (events.js:67:17)
at HTTPParser.onBody (http.js:121:23)
at Socket.ondata (http.js:1349:22)
at TCP.onread (net_uv.js:312:27)

```

The error is caused only when i use loadUser function, if i remove the loadUser Funciton everything is working fine. 
I don't know the reason behind this and am stuck. Can anyone help me please?