# Rails Upgrade / Installation Error **URL:** \ **Category:** Rails\ **Created:** [February 12, 2010, 2:49pm UTC](https://www.ruby-forum.com/t/rails-upgrade-installation-error/183364 "2010-02-12T14:49:10Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![Lee\_Brown](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/l/838e76/32.png) [@Lee\_Brown](https://www.ruby-forum.com/u/Lee_Brown)\ **Post date:** [February 12, 2010, 2:49pm UTC](https://www.ruby-forum.com/t/rails-upgrade-installation-error/183364/1 "2010-02-12T14:49:10Z")
I have been learning Ror, and developing my first application. I unfortunately am also relatively new to the mac, so please forgive my ignorance if I did something blatantly ridiculous. I have been using rails 2.2.2. I learned about accepts\_nested\_attributes\_for this morning, and realized I had to update my version of rails. I first performed a gem update. I cant recall the exact command I invoked at this particular moment, but I believe it was rake rails:update. There was an installation warning, and the installer commented that it was installed in the following directory: /Users/triguy\_nc/.gem/ruby/1.8/bin Being totally stupid, I figured - heck, this isnt goign to work, so I inserted the above into my $PATH in .profile. I actually thought the rake rails:update would have updated my version of rails (I was in a working directory when I did this) I then issued the following command: gem install -v=2.3.5 rails I received the following error message after the install: WARNING: Installing to ~/.gem since /Library/Ruby/Gems/1.8 and /usr/bin aren’t both writable. Successfully installed rails-2.3.5 1 gem installed Installing ri documentation for rails-2.3.5… Installing RDoc documentation for rails-2.3.5… /users/triguy\_nc/work/j4m1\> ruby script/server /Library/Ruby/Site/1.8/rubygems.rb:827:in `report_activate_error': RubyGem version error: rack(1.0.0 not ~> 1.0.1) (Gem::LoadError) from /Library/Ruby/Site/1.8/rubygems.rb:261:in`activate’ from /Library/Ruby/Site/1.8/rubygems.rb:68:in `gem' from /Users/triguy_nc/.gem/ruby/1.8/gems/actionpack-2.3.5/lib/ action_controller.rb:34 from /Library/Ruby/Site/1.8/rubygems/custom_require.rb:31:in`gem\_original\_require’ from /Library/Ruby/Site/1.8/rubygems/custom\_require.rb:31:in `require' from /Users/triguy_nc/.gem/ruby/1.8/gems/activesupport-2.3.5/lib/ active_support/dependencies.rb:156:in`require’ from /Users/triguy\_nc/.gem/ruby/1.8/gems/activesupport-2.3.5/lib/ active\_support/dependencies.rb:521:in `new_constants_in' from /Users/triguy_nc/.gem/ruby/1.8/gems/activesupport-2.3.5/lib/ active_support/dependencies.rb:156:in`require’ from /Users/triguy\_nc/.gem/ruby/1.8/gems/rails-2.3.5/lib/commands/ server.rb:2 from /Library/Ruby/Site/1.8/rubygems/custom\_require.rb:31:in `gem_original_require' from /Library/Ruby/Site/1.8/rubygems/custom_require.rb:31:in`require’ from script/server:3 When I issue $PATH at teh command prompt, I receive the following response: -bash: /Users/triguy\_nc/.gem/ruby/1.8/bin:/opt/local/bin:/opt/local/ sbin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/usr/local/git/bin:/ usr/X11/bin: No such file or directory So, I am basically hosed, but do think I can revert to 2.2.2 in my environment.rb. BUT, I really need to learn some basics of what I am trying to do. Questions: 1. Can someone give me some guidance to undo my errors above, and repair my system so the installation is proper? 2. Can you also point me to a tutorial to help me to understand the method to update rails, so I dont make the same hack mistakes again. Thanks Lee ---
**Author:** ![Lee\_Brown](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/l/838e76/32.png) [@Lee\_Brown](https://www.ruby-forum.com/u/Lee_Brown)\ **Post date:** [February 12, 2010, 3:55pm UTC](https://www.ruby-forum.com/t/rails-upgrade-installation-error/183364/2 "2010-02-12T15:55:48Z")
Lee Brown wrote: > /Users/triguy\_nc/.gem/ruby/1.8/bin > > Being totally stupid, _snigger_ Nah. Just ignorant, like all of us when we first start! > I figured - heck, this isnt goign to work, so I > inserted the above into my $PATH in .profile. I actually thought the > rake rails:update would have updated my version of rails (I was in a > working directory when I did this) That is the first thing you’ll need to undo - or rather, it’s fine, but add it at the END of your path, not at the beginning. > I then issued the following command: gem install -v=2.3.5 rails Well… Why don’t you try “gem update” now ? And then let’s see if everything goes away. > I received the following error message after the install: > > WARNING: Installing to ~/.gem since /Library/Ruby/Gems/1.8 and > /usr/bin aren’t both writable. That’s because you should have done “sudo gem install” - although on a one-user machine, this is merely semantics, on a multi-user machine, it would mean that the gem is available for everyone. Likewise, “sudo gem update” would do an update for all the gems in the machine’s repository. > Successfully installed rails-2.3.5 > 1 gem installed > Installing ri documentation for rails-2.3.5… > Installing RDoc documentation for rails-2.3.5… > /users/triguy\_nc/work/j4m1\> ruby script/server > /Library/Ruby/Site/1.8/rubygems.rb:827:in `report\_activate\_error’: > RubyGem version error: rack(1.0.0 not ~\> 1.0.1) (Gem::LoadError) Apparently, you need rack 1.0.1 … The “sudo gem update” command may help.