npm start not working events.js174 throw er; //Unhandled 'error' event

Is this a bug report?

yes

Did you try recovering your dependencies?

yes

Which terms did you search for in User Guide?

(Write your answer here if relevant.)

Environment

Environment Info:

System: OS: Windows 10 CPU: (4) x64 Intel® Core™ i5-6200U CPU @ 2.30GHz Binaries: Node: 10.15.3 - C:\Program Files\nodejs\node.EXE Yarn: Not Found npm: 6.9.0 - C:\Program Files\nodejs\npm.CMD Browsers: Edge: Not Found Internet Explorer: Not Found npmPackages: react: ^16.8.6 => 16.8.6 react-dom: ^16.8.6 => 16.8.6 react-scripts: 3.0.0 => 3.0.0 npmGlobalPackages: create-react-app: Not Found

Steps to Reproduce

(Write your steps here:)

1. cd my-app 2, npm start

2. create-react-app my-app

3. cd my-app

4. npm start

or

1. create-react-app my-app
2. cd my-app
3. npm start

Expected Behavior

Run the app in development mode Open http://localhost:3000 to view it in the browser

Actual Behavior

when starting my react-app:

when starting a newly created react app

events.js:174 throw er; // Unhandled ‘error’ event ^

Error: spawn cmd ENOENT at Process.ChildProcess._handle.onexit (internal/child_process.js:240:19) at onErrorNT (internal/child_process.js:415:16) at process._tickCallback (internal/process/next_tick.js:63:19) Emitted ‘error’ event at: at Process.ChildProcess._handle.onexit (internal/child_process.js:246:12) at onErrorNT (internal/child_process.js:415:16) at process._tickCallback (internal/process/next_tick.js:63:19) npm ERR! code ELIFECYCLE npm ERR! errno 1 npm ERR! maze@0.1.0 start: react-scripts start npm ERR! Exit status 1 npm ERR! npm ERR! Failed at the maze@0.1.0 start script. npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in: npm ERR! C:\Users\calde\AppData\Roaming\npm-cache_logs\2019-05-04T18_42_43_606Z-debug.log

log file:

0 info it worked if it ends with ok 1 verbose cli [ ‘C:\Program Files\nodejs\node.exe’, 1 verbose cli ‘C:\Users\calde\AppData\Roaming\npm\node_modules\npm\bin\npm-cli.js’, 1 verbose cli ‘start’ ] 2 info using npm@6.9.0 3 info using node@v10.15.3 4 verbose run-script [ ‘prestart’, ‘start’, ‘poststart’ ] 5 info lifecycle maze@0.1.0~prestart: maze@0.1.0 6 info lifecycle maze@0.1.0~start: maze@0.1.0 7 verbose lifecycle maze@0.1.0~start: unsafe-perm in lifecycle true 8 verbose lifecycle maze@0.1.0~start: PATH: C:\Users\calde\AppData\Roaming\npm\node_modules\npm\node_modules\npm-lifecycle\node-gyp-bin;C:\Users\calde\Documents\Media\programming\react\maze\node_modules.bin;C:\Program Files\nodejs;C:\Users\calde\AppData\Roaming\npm; 9 verbose lifecycle maze@0.1.0~start: CWD: C:\Users\calde\Documents\Media\programming\react\maze 10 silly lifecycle maze@0.1.0~start: Args: [ ‘/d /s /c’, ‘react-scripts start’ ] 11 silly lifecycle maze@0.1.0~start: Returned: code: 1 signal: null 12 info lifecycle maze@0.1.0~start: Failed to exec start script 13 verbose stack Error: maze@0.1.0 start: react-scripts start 13 verbose stack Exit status 1 13 verbose stack at EventEmitter.<anonymous> (C:\Users\calde\AppData\Roaming\npm\node_modules\npm\node_modules\npm-lifecycle\index.js:301:16) 13 verbose stack at EventEmitter.emit (events.js:189:13) 13 verbose stack at ChildProcess.<anonymous> (C:\Users\calde\AppData\Roaming\npm\node_modules\npm\node_modules\npm-lifecycle\lib\spawn.js:55:14) 13 verbose stack at ChildProcess.emit (events.js:189:13) 13 verbose stack at maybeClose (internal/child_process.js:970:16) 13 verbose stack at Process.ChildProcess._handle.onexit (internal/child_process.js:259:5) 14 verbose pkgid maze@0.1.0 15 verbose cwd C:\Users\calde\Documents\Media\programming\react\maze 16 verbose Windows_NT 10.0.17134 17 verbose argv “C:\Program Files\nodejs\node.exe” “C:\Users\calde\AppData\Roaming\npm\node_modules\npm\bin\npm-cli.js” “start” 18 verbose node v10.15.3 19 verbose npm v6.9.0 20 error code ELIFECYCLE 21 error errno 1 22 error maze@0.1.0 start: react-scripts start 22 error Exit status 1 23 error Failed at the maze@0.1.0 start script. 23 error This is probably not a problem with npm. There is likely additional logging output above. 24 verbose exit [ 1, true ]

Reproducible Demo

https://github.com/NickCalderone/maze

[tylerlaberge]

I ran into this exact issue as well and found that it is only present with react-scripts@3.0.0, downgrading to react-scripts@2.1.8 resolved the issue without needing to mess with environment variables.

create-react-app my-app
cd my-app
npm install react-scripts@2.1.8
npm start

[BinojBI]

I felt in same problem. Thank you @tylerlaberge it worked for me…