Rails 4 - Strong Parameters , Mass Assignment Security Error

[victorvprem]

I am using Rails 4, when i'm trying to execute bundle exec etl etl/process_all.ebf, it shows the following error

"/home/victor/.rvm/gems/ruby-2.1.0/gems/activemodel-4.0.2/lib/active_model/deprecated_mass_assignment_security.rb:14:in attr_accessible':attr_accessibleis extracted out of Rails into a gem. Please use new recommended protection model for params(strong_parameters) or addprotected_attributes` to your Gemfile to use old one. (RuntimeError)"
Please help me to resolve this issue

[kookster]

Is that all you are getting from the stack trace?
Is this the simple or advanced example?

[victorvprem]

Yes kookster. I tried with simple example