Error: Port is opening

[Zighy]

Operating System and Hardware: Linux CentOS 6.7 64-bit
NodeJS Version: v0.10.42
Serialport version: >= 2.0.6
Python Version: 2.6.6
(Run node -v && npm -v && python --version to get the version numbers.)
node v0.10.42
npm 1.3.6
Python 2.6.6

Expected behavior

Open multiple serial ports, send and receive data on them.

Actual behavior

I receive the following error message:

Error: Port is opening
at SerialPort.open (/home/SIMU/node_modules/serialport/serialport.js:219:24)
at SerialPort. (/home/SIMU/node_modules/serialport/serialport.js:197:12)
at process._tickCallback (node.js:448:13)
at Function.Module.runMain (module.js:499:11)
at startup (node.js:119:16)
at node.js:935:3

Steps and/or code to reproduce the issue

I called open on multiple connections with as a chain of "Q" promises.
Once the connections are opened I start the execution of my code.

To solve the problem i opened the ..../node_modules/serialport/serialport.js at line 219 and I commented out this error handler :

/_if (this.opening) {
return this.error(new Error('Port is opening'), callback);
}/

Now it works like a charm! everything as expected, but I wonder why this error handler was causing problems...

Is there maybe a more elegant solution? What are the negative effects of this modification I made?

==== SOLVED =====

I forgot to use the "openImmediatly" flag set to "false" while using .open() method.. Now it works like a charm again with the error handler... This is not an issue anymore.