title: Heroku Node.JS errors
body: <p>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!</p>
  
  <pre><code>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.&lt;anonymous&gt; (/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
  </code></pre>