Couldn't find that process type (web) error on heroku

Question

I'm trying to deploy a Django application to heroku, but i keep getting the following error when trying to scale my application

heroku ps:scale web=1

Error:

Scaling dynos... !
 !    Couldn't find that process type (web).

I don't understand what am i doing wrong here, my file is called Procfile , it is located at the root of my project, here is how i defined it:

Procfile

web: gunicorn myproject.wsgi --log-file -

Answer 1

follow this steps

1. remove existing build packs heroku buildpacks:clear
2. add them again using index option heroku buildpacks:add
3. add empty commit and push the changes

OR try this one step by step

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