The specified procedure could not be found. - Init_StringIO

Question

Can someone tekl me what's going on here? This used to work for me but now I'm getting this error in both ruby 1.8.7 and ruby 1.9.3

require 'StringIO'
#LoadError: 127: The specified procedure could not be found.   - Init_StringIO

Answer 1

just a problem with case:

require 'stringio'
str = StringIO.new