How to overcome 'Coudn't find that formation' error when adding web dynos to Heroku django app? -

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i'm trying deploy simple django app, , have pushed git repository heroku. however, when attempt run:

heroku ps:scale web=1

i following error

scaling dynos... failed  !    couldn't find formation.

any thoughts problem might be? contents of procfile (below) correct best of knowledge.

web: gunicorn my_app_name.wsgi

to state obvious: way encounter issue if you're working on new app, , try running heroku ps:scale web=1 before you've done git push heroku master. there no procfile on heroku server in case, because there aren't files @ all. :d


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