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I'm a developer and I have a project built with a task runner called Gulp, when I try to launch it via command line I get an error saying that the port is in use (3000). I then changed it to all other ports I could think off and still the same error.

Need to work on this project, anyone know how to fix this?

  • lsof -i | grep 'TCP.*LIST'should tell you what is using all your ports – 0942v8653 Sep 26 '17 at 19:11
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Ok solved it...

Not sure which one of these fixed it, but opened Xcode and accepted the agreement (or run sudo xcodebuild -license accept). I then ran brew update then brew upgrade node and then npm rebuild node-sass --force- to rebuild.

It still wasn't working so I finally changed the order in which I was putting tasks in Gulp and it is now fixed...

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