Cap – Difference between executing code locally and remotely

ben-halls-macbook-air:railsapp Ben$ cap after_deploy
* executing `after_deploy’
./config/deploy.rb:33:in `read’: No such file or directory – ~//cap_test//current/railsapp/config/environment.rb (Errno::ENOENT)
from ./config/deploy.rb:33:in `ReplaceText’
from ./config/deploy.rb:46:in `load’