Hello, When I run bundle install I get the following error message below. Can someone please give me some assistance. Thanks ERROR: Failed to build gem native extension. (Gem::Installer::ExtensionBuildError) /Users/musdev/.rvm/rubies/ruby-1.9.1-p378/bin/ruby extconf.rb Can''t handle 1.9.x yet *** extconf.rb failed *** Could not create Makefile due to some reason, probably lack of necessary libraries and/or headers. Check the mkmf.log file for more details. You may need configuration options. Provided configuration options: --with-opt-dir --without-opt-dir --with-opt-include --without-opt-include=${opt-dir}/include --with-opt-lib --without-opt-lib=${opt-dir}/lib --with-make-prog --without-make-prog --srcdir=. --curdir --ruby=/Users/musdev/.rvm/rubies/ruby-1.9.1-p378/bin/ruby Gem files will remain installed in /Users/musdev/.rvm/gems/ruby-1.9.1-p378/gems/linecache-0.43 for inspection. Results logged to /Users/musdev/.rvm/gems/ruby-1.9.1-p378/gems/linecache-0.43/ext/gem_make.out -- Posted via http://www.ruby-forum.com/. -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.