title: NodeJs flow error
body: <p>I am new to NodeJs and I have the following code using the nimbel library</p>
  
  <pre><code>function createNode(callback){
      exec(console.log("2"),callback);
  }
  
  flow.series([
      function(callback){
          console.log("1");
          for (i=0;i&lt;2;i++){
              flow.parallel([
                  function(callback){
                    createNode(callback
  
  );
                  }
              ],callback);
          }
      },
      function(callback){
          console.log("3");
          callback();
      }
      ]);
  </code></pre>
  
  <p>I want the output from the console to be 1,2,2,3 but the last function that outputs 3 is not being called any ideas ?</p>