Я получаю эту ошибку при попытке отправить приложение Rails v. 1.2.6 в Heroku:
! Heroku push rejected due to an unrecognized error.
! We've been notified, see http://support.heroku.com if the problem persist
s.
To git@heroku.com:myproject.git
! [remote rejected] master -> master (pre-receive hook declined)
error: failed to push some refs to 'git@heroku.com:myproject.git'