Hi, i'm developing a application using Rails 4. In my model I have a method where i make a ping to a host on my network. I'm using 'net-ping' gem, declared in gemFile, and Rails Server starts OK. Well, when i use the gem, as in another apps on Ruby, I do: Net::Ping::External.new @name But i receive: Completed 500 Internal Server Error in 168ms NameError (uninitialized constant Net::Ping::External): app/models/System.rb:169:in `checkSystem' app/controllers/update_controller.rb:13:in `block in check_error' app/controllers/update_controller.rb:12:in `check_error' Searching on the Web I have tested the following: require 'rubygems' require 'net/ping' But now the error is: LoadError (cannot load such file -- net/ping): app/models/System.rb:2:in `<top (required)>' app/controllers/update_controller.rb:11:in `check_error' I don't know how to debug this... Any idea/help? Thanks!! M. -- Posted via http://www.ruby-forum.com/. -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To unsubscribe from this group and stop receiving emails from it, send an email to rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To view this discussion on the web visit https://groups.google.com/d/msgid/rubyonrails-talk/cb85153bac5dd99765db59f398a4bfae%40ruby-forum.com. For more options, visit https://groups.google.com/groups/opt_out.