I read some materials about modules that is modules are combination of classes and modules so i made a example but it gives error"undefined method `run' for #<Man:0x2c2bbc0> (NoMethodError)" .I want call run method in Module1_Class in Module1,is it possible i call run method using Man class object. module Module1 class Module1_Class def run puts "I'm running! in Module1" end def walk puts "I'm walking a bit briskly!" end end def crawl puts "I'm so slowwww!" end end class Man include Module1 def jump puts "I'm bipedal and I can jump like a fool!" end end mister_man = Man.new mister_man.run -- Posted via http://www.ruby-forum.com/.