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Error: can not find module 'underscore'

Issue

If your project dependency has changed on remote and they are not updated on your local machine, then when you try to pull the changes from the remote and try running the server you might get the error that it can not find certain modules. 
module.js:338
    throw err;
          ^
Error: Cannot find module 'underscore'
    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> (/Users/Kavit/nodl/server.js:1:71)
    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 Function.Module.runMain (module.js:501:10)

npm ERR! Darwin 14.4.0
npm ERR! argv "node" "/usr/local/bin/npm" "start"

Soulution

*nix based system
sudo rm -rf node_modules/
sudo npm install
Windows based systems
npm install rimraf -g
rimraf node_modules
sudo npm install

References

https://docs.npmjs.com/cli/rm https://github.com/isaacs/rimraf

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