Error message in monkeybars

Ruby JRuby
1

i am using monkeybars and i got this error while following a tutorial
what i did serveral times and got the same error.

this is the error :

Did not find configuration file ‘run_configuration’, using defaults.
inspecting args
Error in application
NameError - undefined local variable or method greeter_controller' for main:Object classpath:/./main.rb:49 classpath:/./main.rb:1:inrequire’

:1 this is my file 48 begin 49 require 'greeter_controller' 50 GreeterController.instance.open 51 rescue => e 52 show_error_dialog_and_exit(e) 53 end and this is the file that i require package = greeter greeter_controller.rb what am i doing wrong???
2

please help!!!