这里有各种输出
railroad -M | dot -Tsvg > models.svg /Users/me/.rvm/gems/ruby-1.9.2-p290/gems/railroad-0.5.0/lib/railroad/app_diagram.rb:54:in `disable_stdout': uninitialized constant AppDiagram::PLATFORM (NameError) from /Users/me/.rvm/gems/ruby-1.9.2-p290/gems/railroad-0.5.0/lib/railroad/app_diagram.rb:72:in `load_environment' from /Users/me/.rvm/gems/ruby-1.9.2-p290/gems/railroad-0.5.0/lib/railroad/app_diagram.rb:18:in `initialize' from /Users/me/.rvm/gems/ruby-1.9.2-p290/gems/railroad-0.5.0/lib/railroad/models_diagram.rb:14:in `initialize' from /Users/me/.rvm/gems/ruby-1.9.2-p290/gems/railroad-0.5.0/bin/railroad:36:in `new' from /Users/me/.rvm/gems/ruby-1.9.2-p290/gems/railroad-0.5.0/bin/railroad:36:in `<top (required)>' from /Users/me/.rvm/gems/ruby-1.9.2-p290/bin/railroad:19:in `load' from /Users/me/.rvm/gems/ruby-1.9.2-p290/bin/railroad:19:in `<main>'
版本
me$ruby -v ruby 1.9.2p290 (2011-07-09 revision 32553) [x86_64-darwin11.1.0] me$rvm -v rvm 1.8.0 by Wayne E. Seguin (wayneeseguin@gmail.com) [https://rvm.beginrescueend.com/] me$rails -v Rails 3.0.10
Every command给了我同样的问题：
铁路-o型号.-M
铁路-a -i -o full_models.dot -M
铁路–M | dot -Tsvg> models.svg
铁路-C neato -Tpng> controllers.png
解决方法
铁路不使用ruby1.9.2和轨道3.0.10.
Railroady是高级维护版..