Nov 04 09:50:57 eva-app-nodejs heroku/web.1: Starting process with command `npm start`
Nov 04 09:50:59 eva-app-nodejs app/web.1: > Eva@0.0.1 start /app
Nov 04 09:50:59 eva-app-nodejs app/web.1: > nodemon ./bin/www
Nov 04 09:50:59 eva-app-nodejs app/web.1: [nodemon] 1.8.1
Nov 04 09:50:59 eva-app-nodejs app/web.1: [nodemon] to restart at any time, enter `rs`
Nov 04 09:50:59 eva-app-nodejs app/web.1: [nodemon] watching: *.*
Nov 04 09:50:59 eva-app-nodejs app/web.1: [nodemon] starting `node ./bin/www`
Nov 04 07:18:57 eva-app-nodejs app/web.1: module.js:339
Nov 04 07:18:57 eva-app-nodejs app/web.1: throw err;
Nov 04 07:18:57 eva-app-nodejs app/web.1: ^
Nov 04 07:18:57 eva-app-nodejs app/web.1: Error: Cannot find module 'mongodb/node_modules/mongodb-core/node_modules/bson/lib/bson/objectid'
Nov 04 07:18:57 eva-app-nodejs app/web.1: at Function.Module._resolveFilename (module.js:337:15)
Nov 04 07:18:57 eva-app-nodejs app/web.1: at Function.Module._load (module.js:287:25)
Nov 04 07:18:57 eva-app-nodejs app/web.1: at Module.require (module.js:366:17)
Nov 04 07:18:57 eva-app-nodejs app/web.1: at require (module.js:385:17)
Nov 04 07:18:57 eva-app-nodejs app/web.1: at Object.<anonymous> (/app/node_modules/mongoose/lib/drivers/node-mongodb-native/objectid.js:9:16)
Nov 04 07:18:57 eva-app-nodejs app/web.1: at Module._compile (module.js:425:26)
Nov 04 07:18:57 eva-app-nodejs app/web.1: at Object.Module._extensions..js (module.js:432:10)
Nov 04 07:18:57 eva-app-nodejs app/web.1: at Module.load (module.js:356:32)
Nov 04 07:18:57 eva-app-nodejs app/web.1: at Function.Module._load (module.js:311:12)
Nov 04 07:18:57 eva-app-nodejs app/web.1: at Module.require (module.js:366:17)
Nov 04 07:18:57 eva-app-nodejs app/web.1: at require (module.js:385:17)
When I try to puch my code to heroku it shows this error in the logs. I can run it localy without problems, even when i reinstall all my dependencies. mongoose version is 4.0.0
I had this problem before. Have you tried adding the version of node to heroku?