heroku error while deploying node app

I'm trying to deploy an app to heroku. Everything was working fine until now.... I don't know what I've done, but everytime I start the process I'm getting this error,

2012-12-17T14:36:42+00:00 heroku[web.1]: State changed from up to starting
2012-12-17T14:36:42+00:00 heroku[slugc]: Slug compilation finished
2012-12-17T14:36:44+00:00 heroku[web.1]: Stopping all processes with SIGTERM
2012-12-17T14:36:46+00:00 heroku[web.1]: Process exited with status 1
2012-12-17T14:36:47+00:00 heroku[web.1]: State changed from starting to crashed
2012-12-17T14:36:47+00:00 heroku[web.1]: State changed from crashed to starting
2012-12-17T14:36:48+00:00 heroku[web.1]: Starting process with command `node app.js`
2012-12-17T14:36:49+00:00 app[web.1]: module.js:340
2012-12-17T14:36:49+00:00 app[web.1]:           ^
2012-12-17T14:36:49+00:00 app[web.1]: 
2012-12-17T14:36:49+00:00 app[web.1]:     throw err;
2012-12-17T14:36:49+00:00 app[web.1]: Error: Cannot find module './proto'
2012-12-17T14:36:49+00:00 app[web.1]:     at Function.Module._resolveFilename (module.js:338:15)
2012-12-17T14:36:49+00:00 app[web.1]:     at Function.Module._load (module.js:280:25)
2012-12-17T14:36:49+00:00 app[web.1]:     at Module.require (module.js:362:17)
2012-12-17T14:36:49+00:00 app[web.1]:     at require (module.js:378:17)
2012-12-17T14:36:49+00:00 app[web.1]:     at Object.<anonymous> (/app/node_modules/express/node_modules/connect/lib/connect.js:14:13)
2012-12-17T14:36:49+00:00 app[web.1]:     at Object.Module._extensions..js (module.js:467:10)
2012-12-17T14:36:49+00:00 app[web.1]:     at Module._compile (module.js:449:26)
2012-12-17T14:36:49+00:00 app[web.1]:     at Module.load (module.js:356:32)
2012-12-17T14:36:49+00:00 app[web.1]:     at Function.Module._load (module.js:312:12)
2012-12-17T14:36:49+00:00 app[web.1]:     at Module.require (module.js:362:17)

Anyone?

Thanks!

It was a problem with mongoose version

Mmmm I think that you are trying to use your own file, with this sentence:

require('./proto');

Do you have your proto.js file in the same directory? It seems to be that it cant find that module.

Check that you have "proto" in your package.json, this error happend because it cant find a dependency

package.json ex:

{
  "name": "application-name",
  "version": "0.0.1",
  "private": true,
  "scripts": {
    "start": "node app"
  },
  "dependencies": {
    "proto": "*"
  }
}

check this: What is dependency in package.json - nodejs