Q:

Error: Cannot find module 'ms'

I've been trying to get my app running for a few days now, but keep getting errors. I'm closer than I have been so far, but am now getting the "Cannot find module error" when trying to launch my application. 
Below is the error I'm getting now. 
C:\MY-APP\dataService>node dataAPI.js
module.js:338
    throw err;
          ^
Error: Cannot find module 'ms'
    at Function.Module._resolveFilename (module.js:336:15)
    at Function.Module._load (module.js:278:25)
    at Module.require (module.js:365:17)
    at require (module.js:384:17)
    at Object.<anonymous> (C:\MY-APP\node_modules\express\node_modules\debug
\debug.js:14:20)
    at Module._compile (module.js:460:26)
    at Object.Module._extensions..js (module.js:478:10)
    at Module.load (module.js:355:32)
    at Function.Module._load (module.js:310:12)
    at Module.require (module.js:365:17)

I also searched the forums for an answer to this question and found this post on Stack Overflow, but it was in reference to Azure, which I'm not using.
I'm new to Node.js so forgive me if I sound like I don't know what I'm talking about because that's largely the truth.

A:

please see this Link :
https://www.npmjs.com/package/ms
and use :
npm install ms -S 
on your project its automatically save ms package to the node-module.  

