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Lets say I have three classs, each define in its own file. e.g. ClassA in ClassA.rb etc... class ClassA def initialize end def printClassA puts "This is class A" end end class ClassB def initialize end def printClassB puts "This is class B" end end class ClassC def initialize end def bothClasses a = ClassA.new b = ClassB.new a.printClassA b.printClassB end end As you can see, ClassC needs the other two classes in order to function correctly. I assume, there needs to be a way to import/include/load the other two classes in ClassC. I'm new to Ruby and I've tried every permutation of load/include/require and I cannot figure out how to get this to run. I normally just get: classc.rb:2:in `<class:ClassC>': uninitialized constant ClassC::ClassA (NameError) from classc.rb:1:in `<main>' Or a syntax error with my import/include/require statements. Using Windows 7, Ruby 1.9.2, RadRails, all files are in the same project and source folder. I'm sorry if this question is similar to some of the other questions on here, but most of the answers to resolving the "uninitialized constant" is to "just require the file". I've tried and it isn't working.

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