Node JS Express - message is not defined - error.ejs :    **
http://localhost:3000/buyersearch/buyersearch -> link I'm using
 1. app.js

**

    var express = require('express');
    var path = require('path');
    var favicon = require('serve-favicon');
    var logger = require('morgan');
    var cookieParser = require('cookie-parser');
    var bodyParser = require('body-parser');
    var io = require('socket.io')(); // can provide parameter - alt. use default
    var mongodb = require('mongodb');
    var MongoClient = mongodb.MongoClient;
    
    var index = require('./routes/index');
    var users = require('./routes/users');
    var orderSearch = require('./routes/orderSearch');
    var buyerSearch = require('./routes/buyerSearch');
    
    
    
    var app = express();
    
    // view engine setup
    app.set('views', path.join(__dirname, 'views'));
    app.set('view engine', 'ejs');
    
    // uncomment after placing your favicon in /public
    //app.use(favicon(path.join(__dirname, 'public', 'favicon.ico')));
    app.use(logger('dev'));
    app.use(bodyParser.json());
    app.use(bodyParser.urlencoded({ extended: false }));
    app.use(cookieParser());
    app.use(express.static(path.join(__dirname, 'public')));
    
    app.use('/', index);
    app.use('/users', users);
    app.use('/orderSearch', orderSearch);
    app.use('/buyerSearch', buyerSearch);
    
    
    
    // catch 404 and forward to error handler
    app.use(function(req, res, next) {
      var err = new Error('Not Found');
      err.status = 404;
      next(err);
    });
    
    // error handler
    app.use(function(err, req, res, next) {
      // set locals, only providing error in development
      res.locals.message = err.message;
      res.locals.error = req.app.get('env') === 'development' ? err : {};
    
      // render the error page
      res.status(err.status || 500);
      res.render('error');
    });
    
    module.exports = app;

 2. **buyerSearch.js**

    var express = require('express');
    var router = express.Router();
    var mongodb = require('mongodb');
    var MongoClient = mongodb.MongoClient;
    var url = 'mongodb://localhost:27017/WishList';
    
    //buyerIDSearch
    router.get('/buyerSearch', function (req, res) {
        var id = req.query.buyerID;
    
        if (!id || !parseInt(id)) {
            res.render('error', {error: "Please enter an Buyer Identification Number"});
        } else {
            mongoClient.connect(url, function (err, db) {
                if (err) {
                    res.render('error', {error: "Failed to connect"});
                } else {
                    var WishListDB = db.collection('orders');
                    WishListDB.find({"_buyerID": parseInt(id)}).toArray(function (err, result) {
                        if (err || !result || result.length == 0) {
                            res.render('error', {error: "No order found with that ID number"});
                        } else {
                            res.render('order', {order: result[0]})
                        }
    
                    });
    
                }
    
            })
        }
    
    });
    
    module.exports = router;

 3.buyerSearch.ejs

    <!DOCTYPE html>
    <html>
    <head>
      <title></title>
      <link rel='stylesheet' href='/stylesheets/style.css' />
    </head>
    <body>
    <h1></h1>
    <p>Welcome</p>
    
    <li><%buyerSearch.buyerID %></li>
    </body>
    </html>

**The error**
[enter image description here][1]


  [1]: https://i.stack.imgur.com/LJRRR.png