Couldn't find that process type, Heroku

Question

I'm trying to deploy a simple python bot on Heroku but I get the error
couldn't find that process type

When I try to scale the dynos. I already made a procfile and it looks like this:
web: gunicorn dep:app, where "dep" is the name of my python code

What could be the reason?

Answer 1

This may happen if your procfile is misspelt, such as "procfile" or "ProcFile" etc. The file name should be "Procfile" (with a capital P).

sometimes changing the file name is not anough, because git wouldn't spot the change. I had to delete the Procfile completely, then commit the change, than add it again with the right name, and then commit that again:

1. remove your procfile
2. git commit
3. add a new procfile with the exact name "Procfile"
4. commit again
5. git push heroku master (or main - new heroku projects now uses main)

should work!

Answer 2

Make Sure Procfile should not have any extension like .txt otherwise this will be the error

remote: -----> Discovering process types remote: Procfile declares types -> (none)

To create file without extension type following in cmd notepad Procfile. Now add web: gunicorn dep:app and save Now when you will git push heroku master the above lines will be like

remote: -----> Discovering process types remote: Procfile declares types -> web

And the error is gone when you will run

C:\Users\Super-Singh\PycharmProjects\URLShortener>heroku ps:scale web=1

Scaling dynos... done, now running web at 1:Free