打ち間違えじゃないと思うんだが C:/Program Files/ruby-1.8/lib/ruby/site_ruby/1.8/griko.rb:258:in `render': undefined method `left' for nil:NilClass (NoMethodError) from C:/Program Files/ruby-1.8/lib/ruby/site_ruby/1.8/griko.rb:256:in `each' from C:/Program Files/ruby-1.8/lib/ruby/site_ruby/1.8/griko.rb:256:in `render' from C:/Program Files/ruby-1.8/lib/ruby/site_ruby/1.8/griko.rb:247:in `each' from C:/Program Files/ruby-1.8/lib/ruby/site_ruby/1.8/griko.rb:247:in `render' from C:/Program Files/ruby-1.8/lib/ruby/site_ruby/1.8/griko.rb:825:in `render' from C:/Program Files/ruby-1.8/lib/ruby/site_ruby/1.8/griko/sdl.rb:68:in `render' from C:/Program Files/ruby-1.8/lib/ruby/site_ruby/1.8/griko.rb:737:in `call' from C:/Program Files/ruby-1.8/lib/ruby/site_ruby/1.8/griko.rb:737:in `each' from C:/Program Files/ruby-1.8/lib/ruby/site_ruby/1.8/griko.rb:736:in `each' from C:/Program Files/ruby-1.8/lib/ruby/site_ruby/1.8/griko/sdl.rb:67:in `render' from C:/Program Files/ruby-1.8/lib/ruby/site_ruby/1.8/griko/core.rb:664:in `render' from C:/Program Files/ruby-1.8/lib/ruby/site_ruby/1.8/griko/core.rb:575:in `main' from C:/Program Files/ruby-1.8/lib/ruby/site_ruby/1.8/griko/core.rb:930:in `main' from C:/kouza/animation/rb10F.tmp:20 Complete(1)
C:/Program Files/ruby-1.8/lib/ruby/site_ruby/1.8/riko.rb:52:in `context_init': Missing GL_VERSION_1_2 (GLExtensionError) from C:/Program Files/ruby-1.8/lib/ruby/site_ruby/1.8/riko.rb:52:in `initialize' from C:/Program Files/ruby-1.8/lib/ruby/site_ruby/1.8/riko/sdl.rb:301:in `new' from C:/Program Files/ruby-1.8/lib/ruby/site_ruby/1.8/riko/sdl.rb:301:in `initialize' from C:/Program Files/ruby-1.8/lib/ruby/site_ruby/1.8/griko/sdl.rb:20:in `new' from C:/Program Files/ruby-1.8/lib/ruby/site_ruby/1.8/griko/sdl.rb:20:in `initialize' from C:/Program Files/ruby-1.8/lib/ruby/site_ruby/1.8/griko/core.rb:608:in `new' from C:/Program Files/ruby-1.8/lib/ruby/site_ruby/1.8/griko/core.rb:608:in `setup' from E:/prog/kouza/08_animasion.rb:6 ← Screen.setupの行
エラー C:/Program Files/ruby-1.8/bin/mkexy.bat:10:in `exec': No such file or directory - ruby (Errno::ENOENT) from C:/Program Files/ruby-1.8/bin/mkexy.bat:10