node.js - Error: Not implemented Trying to create a stream with ExcelJS -

using node v 5.4.1

i'm trying create stream so:

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] <file>')   .parse(process.argv);  if (program.args.length > 0 && program.args[0]) {   var workbook = new excel.workbook();   var rs       = new stream.readable();   rs.pipe(workbook.xlsx.createinputstream()); < -- error  } else {   console.log("you did not enter valid file path"); } 

but error error: not implemented

which believe because have not implemented ._read thought maybe workbook.xlsx.createinputstream() this.

am using stream package wrong? information great thanks

i don't think have this:

var rs = new stream.readable(); 

just try:

var workbook = new excel.workbook(); stream.pipe(workbook.xlsx.createinputstream());