How to analyze a ruby error? -

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How to analyze a ruby error? -

c:\users\vlad\desktop>rake routes (in c:/users/vlad/desktop) rake aborted! uninitialized constant rake::dsl

c:/ruby192/lib/ruby/1.9.1/rake.rb:2482:in `const_missing' c:/ruby192/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/tasklib.rb:8:in `<class:tasklib>' c:/ruby192/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/tasklib.rb:6:in `<module:rake>' c:/ruby192/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/tasklib.rb:3:in `<top (required)>' c:/ruby192/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/testtask.rb:4:in `require' c:/ruby192/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/testtask.rb:4:in `<top (required)>' c:/ruby192/lib/ruby/gems/1.9.1/gems/railties-3.1.3/lib/rails/test_unit/testing.rake:2:in `require' c:/ruby192/lib/ruby/gems/1.9.1/gems/railties-3.1.3/lib/rails/test_unit/testing.rake:2:in `<top (required)>' c:/ruby192/lib/ruby/gems/1.9.1/gems/railties-3.1.3/lib/rails/test_unit/railtie.rb:12:in `load' c:/ruby192/lib/ruby/gems/1.9.1/gems/railties-3.1.3/lib/rails/test_unit/railtie.rb:12:in `block in <class:testunitrailtie>' c:/ruby192/lib/ruby/gems/1.9.1/gems/railties-3.1.3/lib/rails/railtie.rb:183:in `call' c:/ruby192/lib/ruby/gems/1.9.1/gems/railties-3.1.3/lib/rails/railtie.rb:183:in `block in load_tasks' c:/ruby192/lib/ruby/gems/1.9.1/gems/railties-3.1.3/lib/rails/railtie.rb:183:in `each' c:/ruby192/lib/ruby/gems/1.9.1/gems/railties-3.1.3/lib/rails/railtie.rb:183:in `load_tasks' c:/ruby192/lib/ruby/gems/1.9.1/gems/railties-3.1.3/lib/rails/engine.rb:396:in `block in load_tasks' c:/ruby192/lib/ruby/gems/1.9.1/gems/railties-3.1.3/lib/rails/application/railties.rb:8:in `each' c:/ruby192/lib/ruby/gems/1.9.1/gems/railties-3.1.3/lib/rails/application/railties.rb:8:in `all' c:/ruby192/lib/ruby/gems/1.9.1/gems/railties-3.1.3/lib/rails/engine.rb:396:in `load_tasks' c:/ruby192/lib/ruby/gems/1.9.1/gems/railties-3.1.3/lib/rails/application.rb:103:in `load_tasks' c:/ruby192/lib/ruby/gems/1.9.1/gems/railties-3.1.3/lib/rails/railtie/configurable.rb:30:in `method_missing' c:/users/vlad/desktop/kindle/rakefile:7:in `<top (required)>' c:/ruby192/lib/ruby/1.9.1/rake.rb:2373:in `load' c:/ruby192/lib/ruby/1.9.1/rake.rb:2373:in `raw_load_rakefile' c:/ruby192/lib/ruby/1.9.1/rake.rb:2007:in `block in load_rakefile' c:/ruby192/lib/ruby/1.9.1/rake.rb:2058:in `standard_exception_handling' c:/ruby192/lib/ruby/1.9.1/rake.rb:2006:in `load_rakefile' c:/ruby192/lib/ruby/1.9.1/rake.rb:1991:in `run' c:/ruby192/bin/rake:31:in `<main>'

can walk me through logic of why these lines appear in console? i'm not interested in particular error. when messes , see log this, mean?

does first error critical why programme broke down? if error vague, general logic should in error messages?

this lines backtrace of exception http://www.ruby-doc.org/core-1.9.3/exception.html#method-i-backtrace

also can run commands --trace flag

ruby-on-rails ruby exception logging error-handling

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