Command failed: gm identify: Unable to open file (2) [No such file or directory]. Issue with gm module and ES6 Promises
<p>I'm having issues when executing the following code:</p>

<pre><code>(function(){
var gm = require('gm');
var Promise = require('es6-promise')
.Promise;

function imgAsPromise(imageUrl){
    return new Promise(function(resolve, reject){
        gm(imageUrl)
         .size(function(err, size) {
            if (err) {
              reject(err);
            }

          resolve(size);

       });
    });
}

var imgPromises = [];
var imgUrls = [
'http://cdn.hiconsumption.com/wp-content/uploads/2014/10/2015-Porsche-911-GTS-4.jpg',
'http://avtomaniya.com/pubsource/photo/10712/118-porsche-911-carrera-4-gts-2015-test-drive-avtomaniya-jpg.jpg',
'http://www.joesdaily.com/wp-content/uploads/2014/03/2015-Porsche-Cayman-GTS-2.jpg'
];

for(url in imgUrls){
    imgPromises.push(imgAsPromise(url));

}

Promise.all(imgPromises)
 .then(function(sizes){
    for(size in sizes){
        console.log(size);
    }
 }).catch(function(error){
    console.log("Promise.all error:" + error);
 });

})();
</code></pre>

<p>The thing is that when running the code it breaks and show me the following error message:</p>

<blockquote>
  <p>Promise.all error:Error: Command failed: gm identify: Unable to open
  file (2) [No such file or directory]. gm identify: Request did not
  return an image.</p>
</blockquote>

<p>I verified the images sources and every one exists. The promise should resolve after it gets all images sizes but it doesn't. I would appreciate your help figuring out what could be wrong in this code. </p>

<p>I'm using Node.js 5.3.0 on Windows 10 and GraphicsMagick version 1.3.23 Q16 64 bit.</p>

<p>Thanks in advance for your help.</p>