Hello bpwoods97 !
It appears you are running Haskell using the CmdArgs from the windows command line. You may benifit by checking the link below on diagnosing the code error.
http://community.haskell.org/~ndm/
If you are using Ruby (Ruby is the .rb file format seein your snapshot) you will want to run teh code from a webserver and not your command line. Ruby Random code is at the following link.
http://www.rubyinside.com/21-useful-ruby-and-rails-code-snippets-24.html
What are you specifically trying to do?
choice = rand(1..$cmdargs.length)
$bot < 'Result: ' + $cmdargs[choice-1] brings back the error
http://puu.sh/3rEPp.png when ran

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