Start script missing error when running npm start


Start script missing error when running npm start

I’m receiving this error when trying to debug my node application using the npm start command.

npm ERR! Windows_NT 6.3.9600
npm ERR! argv “C:\Program Files\nodejs\\node.exe” “C:\Program Files\nodejs\node_modules\npm\bin\npm-cli.js” “start”
npm ERR! node v0.12.7
npm ERR! npm v2.11.3
npm ERR! missing script: start
npm ERR!
npm ERR! If you need help, you may report this error at:
npm ERR! ERR! Please include the following file with any support request:
npm ERR! C:\Users\andrmoll.NORTHAMERICA\Documents\GitHub\SVIChallenge\npm-debug.log

From the debug file:

verbose stack Error: missing script: start
4 verbose stack at run (C:\Program Files\nodejs\node_modules\npm\lib\run-script.js:142:19)
4 verbose stack at C:\Program Files\nodejs\node_modules\npm\lib\run-script.js:58:5
4 verbose stack at C:\Program Files\nodejs\node_modules\npm\node_modules\read-package-json\read-json.js:345:5
4 verbose stack at checkBinReferences_ (C:\Program Files\nodejs\node_modules\npm\node_modules\read-package-json\read-json.js:309:45)
4 verbose stack at final (C:\Program Files\nodejs\node_modules\npm\node_modules\read-package-json\read-json.js:343:3)
4 verbose stack at then (C:\Program Files\nodejs\node_modules\npm\node_modules\read-package-json\read-json.js:113:5)
4 verbose stack at C:\Program Files\nodejs\node_modules\npm\node_modules\read-package-json\read-json.js:300:12
4 verbose stack at evalmachine.:334:14
4 verbose stack at C:\Program Files\nodejs\node_modules\npm\node_modules\graceful-fs\graceful-fs.js:102:5
4 verbose stack at FSReqWrap.oncomplete (evalmachine.:95:15)


Solution 1:

It looks like you might not have defined a start script in your package.json file or your project does not contain a server.js file.

If there is a server.js file in the root of your package, then npm will default the start command to node server.js.

You could either change the name of your application script to server.js or add the following to your package.json

"scripts": {
    "start": "node your-script.js"

Or … you could just run node your-script.js directly

Solution 2:

This error also happens if you added a second “script” key in the package.json file. If you just leave one “script” key in the package.json the error disappears.

Solution 3:

In my case, it wasn’t working because I used "scripts" twice. After combining – it is ok.

"scripts": {
  "test": "make test",
  "start": "node index.js"

Solution 4:

Please use the below line of code in script object which is there in package.json

"scripts": {
    "start": "webpack-dev-server --hot"

For me it worked perfectly fine.

Solution 5:

If you have are using babelify and watchify, go to:


and add this in “scripts”:

"scripts": {
    "start": "watchify the-path-to-your-source-jsx-file -v -t [ babelify --presets [ react ] ] -o the-path-to-your-output-js-file"

An example would be:

"scripts": {
    "start": "watchify src/main.jsx -v -t [ babelify --presets [ react ] ] -o public/js/main.js"

Thanks to Mark Price from DevSlopes

Solution 6:

Make sure the PORTS ARE ON

var app = express();
app.set('port', (process.env.PORT || 5000));


app.listen(app.get('port'), function() {
    console.log("Node app is running at localhost:" + app.get('port'))

Still a newbee in node js but this caused more of this.