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Editorial Team
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Asked: 2026-06-17T16:14:56+00:00

Heroku gives me this error, after I deploy the node.js app of mine. Do

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Heroku gives me this error, after I deploy the node.js app of mine. Do you have any idea what is error message means? Thank you!

2013-01-14T22:50:34+00:00 heroku[web.1]: State changed from crashed to starting
2013-01-14T22:50:36+00:00 heroku[web.1]: Starting process with command `node app.js`
2013-01-14T22:50:37+00:00 app[web.1]: 
2013-01-14T22:50:37+00:00 app[web.1]: /app/node_modules/express/lib/router/index.js:252
2013-01-14T22:50:37+00:00 app[web.1]:     throw new Error(msg);
2013-01-14T22:50:37+00:00 app[web.1]:           ^
2013-01-14T22:50:37+00:00 app[web.1]: Error: .get() requires callback functions but got a [object Undefined]
2013-01-14T22:50:37+00:00 app[web.1]:     at Router.route.Route.sensitive (/app/node_modules/express/lib/router/index.js:252:11)
2013-01-14T22:50:37+00:00 app[web.1]:     at Array.forEach (native)
2013-01-14T22:50:37+00:00 app[web.1]:     at Router.route (/app/node_modules/express/lib/router/index.js:248:13)
2013-01-14T22:50:37+00:00 app[web.1]:     at Router.methods.forEach.Router.(anonymous function) [as get] (/app/node_modules/express/lib/router/index.js:270:16)
2013-01-14T22:50:37+00:00 app[web.1]:     at Function.methods.forEach.app.(anonymous function) [as get] (/app/node_modules/express/lib/application.js:411:26)
2013-01-14T22:50:37+00:00 app[web.1]:     at Routes.self.init (/app/routes.js:23:9)
2013-01-14T22:50:37+00:00 app[web.1]:     at Object.<anonymous> (/app/app.js:42:8)
2013-01-14T22:50:37+00:00 app[web.1]:     at Module._compile (module.js:449:26)
2013-01-14T22:50:37+00:00 app[web.1]:     at Object.Module._extensions..js (module.js:467:10)
2013-01-14T22:50:37+00:00 app[web.1]:     at Module.load (module.js:356:32)
2013-01-14T22:50:38+00:00 heroku[web.1]: State changed from starting to crashed
2013-01-14T22:50:38+00:00 heroku[web.1]: Process exited with status 1
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1 Answer

  1. Editorial Team

    Try checking your /app/routes.js file, there will be a route that doesn’t have two parameters. Try commenting out around lines 23.

    Or isn’t being defined properly, but this issue shouldn’t be related to Heroku, and it should throw an error when you boot node app.js locally shrug

    Hope you managed to sort it!

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