ruby command line gem not working in windows -

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i wrote command line gem based on tutorial here:

http://robdodson.me/how-to-write-a-command-line-ruby-gem/

it works fine in linux, reason can't run in windows.

in windows following error:

c:/ruby193/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require': cannot load such file -- my_gem_name (loaderror)         c:/ruby193/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'         c:/ruby193/lib/ruby/gems/1.9.1/gems/my_gem_name-0.0.1/bin/importer:3:in `<top (required)>'         c:/ruby193/bin/importer:23:in `load'         c:/ruby193/bin/importer:23:in `<main>'

any insight appreciated


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