My app's specs:

• Python 3

• Flask

• SQLite (initially). Then, PostgreSQL to be compatible with Heroku.

• Built in AWS Cloud 9

• Requirements:

  cs50 Flask Flask-Session requests gunicorn psycopg2

Errors and Solutions

ERROR

Installed Heroku?

MEANS

CAUSE

FIX

Type heroku --version in terminal to check

Installed correct version of Python?

Installed dependencies to support Heroku integration

Put gunicorn, psycopg2 in requirement.txt

Procfile is correct

• Must be 'Procfile', not 'ProcFile', 'procfile', or 'profile'
• No Procfile.txt or any format

H14 – No web dynos running

Heroku can't recognize your app from Github repo. Check Overview> Dyno formation>"There is no process type"

• Heroku account and app haven't connected
• Procfile is in wrong format
• Content in Procfile is wrong
• Didn't install gunicorn to support Dyno formation

Scaling dynos... ! ▸ Invalid credentials provided. heroku: Press any key to open up the browser to login or q to exit: › Error: quit ▸ Command failed: heroku login

heroku ps:scale web=1 --app <app-name-registered-in-Heroku> failed

Heroku account and app haven't connected

Run heroku login to login on browser Or Run heroku login -i to log in Heroku from Terminal

Missing required flag: -a, --app APP app to run command against

heroku ps:scale or heroku ps:scale web=1 or heroku ps:scale web=2 or heroku ps failed

heroku ps to start the app’s web server(s)

Heroku account and app haven't connected

Run heroku login to login on browser