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我正在尝试运行一个名为CeWL的 Ruby 程序。我已经添加了所有必需的宝石。当我尝试使用 ruby​​.exe 打开 .rb 时,它会显示消息missing url agrument (try --help),当我尝试运行它时,start cmd with ruby或者start cmd with ruby on rails我得到以下信息:

CeWL 5.0 Robin Wood (robin@digininja.org) (www.digininja.org)
C:/RailsInstaller/Ruby1.9.3/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:
36:in `require': cannot load such file -- ./cewl_lib (LoadError)
    from C:/RailsInstaller/Ruby1.9.3/lib/ruby/site_ruby/1.9.1/rubygems/custo
m_require.rb:36:in `require'
    from C:/Users/Owner/Desktop/cewl/cewl.rb:90:in `<main>'
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