Can't launch nodejs + express basic program - node.js

Question

I am having a bit of trouble with a basic nodejs and express program.
The problem is when I use npm start which should run node .\bin\www I get these errors:
C:\Users\{USRNAME}\Desktop\projets\cdc\cdc-api>npm start
cdc-api#0.0.0 start C:\Users\{USRNAME}\Desktop\projets\cdc\cdc-api
node .\bin\www
events.js:72
throw er; // Unhandled 'error' event
^
Error: listen EADDRINUSE
at errnoException (net.js:904:11)
at Server._listen2 (net.js:1042:14)
at listen (net.js:1064:10)
at Server.listen (net.js:1138:5)
at Function.app.listen (C:\Users\{USRNAME}\Desktop\projets\cdc\cdc-api\node_mo
dules\express\lib\application.js:556:24)
at Object.<anonymous> (C:\Users\{USRNAME}\Desktop\projets\cdc\cdc-api\bin\www:
7:18)
at Module._compile (module.js:456:26)
at Object.Module._extensions..js (module.js:474:10)
at Module.load (module.js:356:32)
at Function.Module._load (module.js:312:12)
npm ERR! cdc-api#0.0.0 start: `node .\bin\www`
npm ERR! Exit status 8
npm ERR!
npm ERR! Failed at the cdc-api#0.0.0 start script.
npm ERR! This is most likely a problem with the cdc-api package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR! node .\bin\www
npm ERR! You can get their info via:
npm ERR! npm owner ls cdc-api
npm ERR! There is likely additional logging output above.
npm ERR! System Windows_NT 6.2.9200
npm ERR! command "C:\\Program Files\\nodejs\\\\node.exe" "C:\\Program Files\\nod
ejs\\node_modules\\npm\\bin\\npm-cli.js" "start"
npm ERR! cwd C:\Users\{USRNAME}\Desktop\projets\cdc\cdc-api
npm ERR! node -v v0.10.32
npm ERR! npm -v 1.4.28
npm ERR! code ELIFECYCLE
npm ERR!
npm ERR! Additional logging details can be found in:
npm ERR! C:\Users\{USRNAME}\Desktop\projets\cdc\cdc-api\npm-debug.log
npm ERR! not ok code 0
C:\Users\{USRNAME}\Desktop\projets\cdc\cdc-api>
and here is what I have in npm-debug.log:
0 info it worked if it ends with ok
1 verbose cli [ 'C:\\Program Files\\nodejs\\\\node.exe',
1 verbose cli 'C:\\Program Files\\nodejs\\node_modules\\npm\\bin\\npm-cli.js',
1 verbose cli 'start' ]
2 info using npm#1.4.28
3 info using node#v0.10.32
4 verbose node symlink C:\Program Files\nodejs\\node.exe
5 verbose run-script [ 'prestart', 'start', 'poststart' ]
6 info prestart cdc-api#0.0.0
7 info start cdc-api#0.0.0
8 verbose unsafe-perm in lifecycle true
9 info cdc-api#0.0.0 Failed to exec start script
10 error cdc-api#0.0.0 start: `node .\bin\www`
10 error Exit status 8
11 error Failed at the cdc-api#0.0.0 start script.
11 error This is most likely a problem with the cdc-api package,
11 error not with npm itself.
11 error Tell the author that this fails on your system:
11 error node .\bin\www
11 error You can get their info via:
11 error npm owner ls cdc-api
11 error There is likely additional logging output above.
12 error System Windows_NT 6.2.9200
13 error command "C:\\Program Files\\nodejs\\\\node.exe" "C:\\Program Files\\nodejs\\node_modules\\npm\\bin\\npm-cli.js" "start"
14 error cwd C:\Users\Moucheg\Desktop\projets\cdc\cdc-api
15 error node -v v0.10.32
16 error npm -v 1.4.28
17 error code ELIFECYCLE
18 verbose exit [ 1, true ]
I have tried everything I found on internet (reinstall node, recreate package.json, ...) I can't get it to work.
FYI, I am on Windows 8 (if it's of any help)
Thank you in advance for your help guys (and girls ;)).

Answer 1

The error "EADDRINUSE" means the port you're attempting to use is already in use by your system. Try changing the port used in your app or closing whatever program is using it.

Answer 2

The error means that the port is currently in use.
Update the code to use a different port. Often times, node.js/express samples assign the port in app.js.

Answer 3

EADDRINUSE happens when your code is using the same port of another program.
You can try to use another port to see if the problem is resolved.