Error: Cannot find module './proto' on Heroku - node.js

Question

I can't seem to figure out why this works locally fine, but when I push it to Heroku it fails with the following error.
Error from Heroku
Starting process with command `node web.js`
module.js:337
throw new Error("Cannot find module '" + request + "'");
^
Error: Cannot find module './proto'
at Function._resolveFilename (module.js:337:11)
at Function._load (module.js:279:25)
at Module.require (module.js:359:17)
at require (module.js:375:17)
at Object.<anonymous> (/app/node_modules/express/node_modules/connect/lib/connect.js:14:13)
at Module._compile (module.js:446:26)
at Object..js (module.js:464:10)
at Module.load (module.js:353:31)
at Function._load (module.js:311:12)
at Module.require (module.js:359:17)
Process exited with status 1
State changed from starting to crashed
package.json
{
"name": "divtest",
"version": "0.0.2",
"dependencies": {
"underscore": "1.3.x",
"crypto": "0.0.x",
"knox": "0.3.x",
"mongoose": "~3.1.2",
"mime": "1.2.x",
"express": "3.0.x",
"request": "~2.9.203"
},
"engines": {
"node": "0.6.x",
"npm": "1.0.x"
}
}
./proto is a local module that connect is calling
I've blown away my ./node_modules folder and did a npm install --save and still get the same results.

Answer 1

I had this issue, and my problem was that I'm a git beginner and hadn't properly committed all of the files that were needed. It looks like there was a proto.js in connect somewhere.
I did a git add * (...) and pushed again and it all went nicely.
Another telling error, was that on push Heroku complained about unmet dependencies.