Nodejs getting error while download files using FTP

Question

I am using node-ftp package for FTP connection. Below code example

const FTPClient = require('ftp');
const fs = require("fs");
let ftp_client = new FTPClient();
let ftpConfig = {
    host: '94.200.190.184',
    port: 21,
    user: '99*******',
    password: '******'
}

var downloadList = [];
//create a connection to ftp server
ftp_client.connect(ftpConfig);
//list directory and files from server.
ftp_client.on('ready', function() { 
    ftp_client.list('Gracenote',function(err, list) {
        if (err) throw err;
        list.map(function(entry){
            console.log(entry.name);
            if (entry.name !== '.' || entry.name !== '..') {
                downloadList.push(entry.name);
             }
        });
    downloadList.map(function(file, index){
      console.log(file);
      // Download remote files and save it to the local file system:
      ftp_client.get('Gracenote/' + file, function(err, stream) {

        if (err) throw err;
        stream.once('close', function() { ftp_client.end(); });
        stream.pipe(fs.createWriteStream(file));

      });
    });
    ftp_client.end();
    });
  });

I am getting error like:

Is their is any way we can download files using batch process