Problem to the symfony2.7 upload on heroku

[coleccionista777]

Hello friend, I need your help with a problem to the symfony2.7 upload on heroku, I entered the command “git push heroku master” this is the error :
https://drive.google.com/file/d/0BztswIqNuWoTQjA4enJzelM0dlU/view
I hope you can help me.
Please excuse my limited English.