Ruby installation missing psych, suggests reinstall of libyaml and ruby, and still have image not found? RailsTutorial -


when using command in middle of railstutorial ( on laptop setup) : 

rvm use 2.0.0@railstutorial_rails_4_0 --create --default

i receive following errors: 

laptop:rubygems-1.8.25 user_name$ rvm use 2.0.0@railstutorial_rails_4_0 --create --default using /users/user_name/.rvm/gems/ruby-2.0.0-p451 gemset railstutorial_rails_4_0 /users/user_name/.rvm/rubies/ruby-2.0.0-p451/lib/ruby/2.0.0/yaml.rb:4:in `<top (required)>': seems ruby installation missing psych (for yaml output). eliminate warning, please install libyaml , reinstall ruby. /users/user_name/.rvm/rubies/ruby-2.0.0-p451/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require': dlopen(/users/user_name/.rvm/rubies/ruby-2.0.0-p451/lib/ruby/2.0.0/x86_64-darwin13.1.0/psych.bundle, 9): library not loaded: /usr/local/lib/libyaml-0.2.dylib (loaderror) referenced from: /users/user_name/.rvm/rubies/ruby-2.0.0-p451/lib/ruby/2.0.0/x86_64-darwin13.1.0/psych.bundle reason: image not found - /users/user_name/.rvm/rubies/ruby-2.0.0-p451/lib/ruby/2.0.0/x86_64-darwin13.1.0/psych.bundle /users/user_name/.rvm/rubies/ruby-2.0.0-p451/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require' /users/user_name/.rvm/rubies/ruby-2.0.0-p451/lib/ruby/2.0.0/psych.rb:1:in `<top (required)>' /users/user_name/.rvm/rubies/ruby-2.0.0-p451/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require' /users/user_name/.rvm/rubies/ruby-2.0.0-p451/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require' /users/user_name/.rvm/rubies/ruby-2.0.0-p451/lib/ruby/2.0.0/yaml.rb:5:in `<top (required)>' /users/user_name/.rvm/rubies/ruby-2.0.0-p451/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require' /users/user_name/.rvm/rubies/ruby-2.0.0-p451/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require' /users/user_name/.rvm/rubies/ruby-2.0.0-p451/lib/ruby/2.0.0/rubygems.rb:600:in `load_yaml' /users/user_name/.rvm/rubies/ruby-2.0.0-p451/lib/ruby/2.0.0/rubygems/config_file.rb:314:in `load_file' /users/user_name/.rvm/rubies/ruby-2.0.0-p451/lib/ruby/2.0.0/rubygems/config_file.rb:191:in `initialize' /users/user_name/.rvm/rubies/ruby-2.0.0-p451/lib/ruby/2.0.0/rubygems/gem_runner.rb:66:in `new' /users/user_name/.rvm/rubies/ruby-2.0.0-p451/lib/ruby/2.0.0/rubygems/gem_runner.rb:66:in `do_configuration' /users/user_name/.rvm/rubies/ruby-2.0.0-p451/lib/ruby/2.0.0/rubygems/gem_runner.rb:46:in `run' /users/user_name/.rvm/rubies/ruby-2.0.0-p451/bin/gem:21:in `<main>'

i've reinstalled libyaml, , reinstalled ruby, , returns these errors. no matter do, end @ list of errors.


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