Find Gruff lib. There is a base.rb file.

In
-------------8<-------8<-------------
1. begin
2.  require 'rmagick'
3. rescue LoadError
4.  require 'RMagick' # capitalized on Windows
5. end

-------------8<-------8<-------------
comment out lines 1-3 and 5. Gruff does not deal good with "requre" on 
Win.

Hope this helps you.

Pavel

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