# Ruby 1.8 & 1.9 problem **URL:** \ **Category:** Rails\ **Created:** [August 31, 2009, 7:12am UTC](https://www.ruby-forum.com/t/ruby-1-8-1-9-problem/174657 "2009-08-31T07:12:47Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![abhishek](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/7ba0ec/32.png) [@abhishek](https://www.ruby-forum.com/u/abhishek)\ **Post date:** [August 31, 2009, 7:12am UTC](https://www.ruby-forum.com/t/ruby-1-8-1-9-problem/174657/1 "2009-08-31T07:12:47Z")
hi i had ruby 1.8.7 in my system. (Ubuntu 9.04) so in console when i type: which ruby =\> /usr/bin/ruby ruby -v =\>ruby 1.8.7 (2008-08-11 patchlevel 72) [i486-linux] now i have installed ruby 1.9 side by side to the previous one and something goes wrong during that. now in console: which ruby =\>/usr/local/bin/ruby ruby -v =\>ruby 1.9.0 (2007-12-25 revision 14709) [i686-linux] ruby1.8 -v =\>ruby 1.8.7 (2008-08-11 patchlevel 72) [i486-linux] ruby1.9 -v =\>ruby 1.9.0 (2008-06-20 revision 17482) [i486-linux] problem is that now i’m not able to start web server i.e. when i pass command ‘ruby script/server’ to start Webrick (inside my rails application), the following error comes: /home/abhi/Rails\_Projects/Blog/vendor/rails/activesupport/lib/active\_support/vendor.rb:33:in `require': no such file to load -- builder (LoadError) from /home/abh/Rails_Projects/Blog/vendor/rails/activesupport/lib/active_support/vendor.rb:33:in`rescue in \’ from /home/abhi/Rails\_Projects/Blog/vendor/rails/activesupport/lib/active\_support/vendor.rb:2:in `' from /home/abhi/Rails_Projects/Blog/vendor/rails/activesupport/lib/active_support.rb:26:in`require’ from /home/abhi/Rails\_Projects/Blog/vendor/rails/activesupport/lib/active\_support.rb:26:in `' from /home/abhi/Rails_Projects/Blog/vendor/rails/railties/lib/commands/server.rb:1:in`require’ from /home/abhi/Rails\_Projects/Blog/vendor/rails/railties/lib/commands/server.rb:1:in `' from script/server:3:in`require’ from script/server:3:in `’ when i pass ‘ruby script/console’ : /usr/local/lib/ruby/1.9.0/irb/completion.rb:10:in `require': no such file to load -- readline (LoadError) from /usr/local/lib/ruby/1.9.0/irb/completion.rb:10:in`\’ from /usr/local/lib/ruby/1.9.0/irb/init.rb:250:in `require' from /usr/local/lib/ruby/1.9.0/irb/init.rb:250:in`block in load\_modules’ from /usr/local/lib/ruby/1.9.0/irb/init.rb:248:in `each' from /usr/local/lib/ruby/1.9.0/irb/init.rb:248:in`load\_modules’ from /usr/local/lib/ruby/1.9.0/irb/init.rb:21:in `setup' from /usr/local/lib/ruby/1.9.0/irb.rb:54:in`start’ from /usr/local/bin/irb:13:in `’ can anyone guide me…? thanx. ---
**Author:** ![abhishek](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/7ba0ec/32.png) [@abhishek](https://www.ruby-forum.com/u/abhishek)\ **Post date:** [August 31, 2009, 7:46am UTC](https://www.ruby-forum.com/t/ruby-1-8-1-9-problem/174657/2 "2009-08-31T07:46:54Z")
you will have to install gem and all your gems using the new ruby 1.9 installation. The gem install is isolated to the ruby install. On Aug 30, 10:12 pm, Abhishek S. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) ---
**Author:** ![abhishek](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/7ba0ec/32.png) [@abhishek](https://www.ruby-forum.com/u/abhishek)\ **Post date:** [August 31, 2009, 9:12am UTC](https://www.ruby-forum.com/t/ruby-1-8-1-9-problem/174657/3 "2009-08-31T09:12:31Z")
heimdull wrote: > you will have to install gem and all your gems using the new ruby 1.9 > installation. The gem install is isolated to the ruby install. > > On Aug 30, 10:12�pm, Abhishek S. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) which gems i should install. when i type ‘gem list’ it shows: **LOCAL GEMS** how can i get the list of gems and how can i know that which gems are required?? i am using rails 2.1.0 -Abhishek ---
**Author:** ![abhishek](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/7ba0ec/32.png) [@abhishek](https://www.ruby-forum.com/u/abhishek)\ **Post date:** [August 31, 2009, 10:26am UTC](https://www.ruby-forum.com/t/ruby-1-8-1-9-problem/174657/4 "2009-08-31T10:26:46Z")
[snip] > can anyone guide me…? First, you’ll need to install Ruby 1.9.1 because it was the first production release of Ruby 1.9. Next, you should be able to install gems as follows: For Ruby 1.9.1: sudo gem1.9 install For Ruby 1.8.7: sudo gem1.8 install Good luck, -Conrad ---
**Author:** ![abhishek](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/7ba0ec/32.png) [@abhishek](https://www.ruby-forum.com/u/abhishek)\ **Post date:** [August 31, 2009, 9:13am UTC](https://www.ruby-forum.com/t/ruby-1-8-1-9-problem/174657/5 "2009-08-31T09:13:33Z")
heimdull wrote: > you will have to install gem and all your gems using the new ruby 1.9 > installation. The gem install is isolated to the ruby install. > > On Aug 30, 10:12�pm, Abhishek S. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) how can i make my gems using ruby 1.9?? -abhishek ---
**Author:** ![abhishek](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/7ba0ec/32.png) [@abhishek](https://www.ruby-forum.com/u/abhishek)\ **Post date:** [September 1, 2009, 2:32pm UTC](https://www.ruby-forum.com/t/ruby-1-8-1-9-problem/174657/6 "2009-09-01T14:32:00Z")
Hi… If you want to work with both version use rvm… [http://www.rubyinside.com/rvm-ruby-version-manager-2347.html](http://www.rubyinside.com/rvm-ruby-version-manager-2347.html) Rejoice _+ o +_ Arun K. .J +91-97 89 89 19 33 > **[Rails Builder](http://railsbuilder.blogspot.com)** > > A web blog for all Ruby on rails developers Sent from Mahape, MH, India