As requested on Heroku, I am trying to upgrade from Cedar-10 to Cedar-14, but in vain. On my console, When I execute
heroku stack:set cedar-14
I get this:
`stack:set` is not a heroku command.
Even if I've already installed the latest version of heroku toolbelt as proposed there (I am on Windows), I get the same error message
Many thanks
It looks like your current heroku version isn't up to date.
Things you can try:
heroku update
If that doesn't work
gem uninstall heroku
Reinstall the gem or the heroku toolbelt
If that doesn't work:
which heroku
Delete the executable at the path listed by the above mentioned command
After that reinstall the heroku toolbelt
For more info check: https://devcenter.heroku.com/articles/heroku-command
来源：https://stackoverflow.com/questions/34456254/heroku-cant-upgrade-to-cedar-14