Error: Not implemented Trying to create a stream with ExcelJS <p>Using Node v 5.4.1</p> <p>I'm trying to create a stream like so:</p> <pre><code>const program = require('commander'), Excel = require('exceljs'), colors = require('colors/safe'), inquirer = require('inquirer'), async = require('async'), stream = require('stream'); program .version('0.0.1') .usage('[options] &lt;file&gt;') .parse(process.argv); if (program.args.length &gt; 0 &amp;&amp; program.args[0]) { var workbook = new Excel.Workbook(); var rs = new stream.Readable(); rs.pipe(workbook.xlsx.createInputStream()); &lt; -- Error } else { console.log("You did not enter a valid file path"); } </code></pre> <p>But I get the error <code>Error: Not Implemented</code> </p> <p>which I believe is because I have not implemented the <code>._read</code> but I thought maybe <code>workbook.xlsx.createInputStream()</code> would do this.</p> <p>Am I using the stream package wrong? Any information would be great thanks</p>