webpack-dev-server: npm error Windows_NT 7601 - npm

Question

I have got the following error while I tried to command :
$ npm run dev
I have also used nodejs cmd, git and also having administritive privileges with the cmd.
Error is like following:
D:\IIT Samester\KAZ\ReactJSProjects\GitFrom\webpack-example-master\webpack-examp
le-master>npm run dev
> webpack-example#0.0.0 dev D:\IIT Samester\KAZ\ReactJSProjects\GitFrom\webpack-example-master\webpack-example-master
> webpack-dev-server --devtool eval --progress --colors --hot --content-base build/
70% 1/1 build modulesevents.js:85
throw er; // Unhandled 'error' event
^
Error: listen EACCES
at exports._errnoException (util.js:746:11)
at Server._listen2 (net.js:1129:19)
at listen (net.js:1172:10)
at net.js:1270:9
at GetAddrInfoReqWrap.asyncCallback [as callback] (dns.js:81:16)
at GetAddrInfoReqWrap.onlookup [as oncomplete] (dns.js:99:10)
npm ERR! Windows_NT 6.1.7601
npm ERR! argv "node" "C:\\Users\\hp\\AppData\\Roaming\\npm\\node_modules\\npm\\b
in\\npm-cli.js" "run" "dev"
npm ERR! node v0.12.2
npm ERR! npm v2.7.6
npm ERR! code ELIFECYCLE
npm ERR! webpack-example#0.0.0 dev: `webpack-dev-server --devtool eval --progress --colors --hot --content-base build/`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the webpack-example#0.0.0 dev script 'webpack-dev-server--devtool eval --progress --colors --hot --content-base build/'.
npm ERR! This is most likely a problem with the webpack-example package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR! webpack-dev-server --devtool eval --progress --colors --hot --content-base build/
npm ERR! You can get their info via:
npm ERR! npm owner ls webpack-example
npm ERR! There is likely additional logging output above.
npm ERR! Please include the following file with any support request:
npm ERR! D:\IIT Samester\KAZ\ReactJSProjects\GitFrom\webpack-example-master\
webpack-example-master\npm-debug.log
D:\IIT Samester\KAZ\ReactJSProjects\GitFrom\webpack-example-master\webpack-example-master>
Please do help to solve the issue.

Answer 1

Yes, I have solved the issue by self.
Its a problem on the port, nothing else.
I have other program that works on port 8080.
webpack-dev-server also wants to use that port by default.
So I have just change the port number from 8080 to 8081 (can be anything valid other) in the ProjectFolder \node_modules\webpack-dev-server\bin\webpack-dev-server.js file.
Anothe solution is that you can stop that program working on port 8080.
Thank you :)