# Can't find rails after re-installing/upgrading Kubuntu **URL:** \ **Category:** Rails\ **Created:** [November 25, 2007, 9:47pm UTC](https://www.ruby-forum.com/t/cant-find-rails-after-re-installing-upgrading-kubuntu/121236 "2007-11-25T21:47:11Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![JSPablo\_FernSSSSnd](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/e9bcb4/32.png) [@JSPablo\_FernSSSSnd](https://www.ruby-forum.com/u/JSPablo_FernSSSSnd)\ **Post date:** [November 25, 2007, 9:47pm UTC](https://www.ruby-forum.com/t/cant-find-rails-after-re-installing-upgrading-kubuntu/121236/1 "2007-11-25T21:47:11Z")
Hello Railers (?), I have just re-installed my machine with the lattest Kubuntu, which brings with Rails 1.2.4 instead of 1.2.3. Now my Rail project doesn’t start anymore. At first I’ve got this message: Cannot find gem for Rails ~\>1.2.3.0: Install the missing gem with ‘gem install -v=1.2.3 rails’, or change environment.rb to define RAILS\_GEM\_VERSION with your desired version. then I went and I updated environment.rb and now it says: Cannot find gem for Rails ~\>1.2.4.0: Install the missing gem with ‘gem install -v=1.2.4 rails’, or change environment.rb to define RAILS\_GEM\_VERSION with your desired version. Just to check I created a new rails project and it just works. Any ideas what else I am forgetting to change/update to have my old project working? Thank you. ---
**Author:** ![JSPablo\_FernSSSSnd](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/e9bcb4/32.png) [@JSPablo\_FernSSSSnd](https://www.ruby-forum.com/u/JSPablo_FernSSSSnd)\ **Post date:** [November 26, 2007, 10:21am UTC](https://www.ruby-forum.com/t/cant-find-rails-after-re-installing-upgrading-kubuntu/121236/2 "2007-11-26T10:21:12Z")
What does it environment.rb say in the project that works? ---
**Author:** ![JSPablo\_FernSSSSnd](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/e9bcb4/32.png) [@JSPablo\_FernSSSSnd](https://www.ruby-forum.com/u/JSPablo_FernSSSSnd)\ **Post date:** [November 26, 2007, 12:58pm UTC](https://www.ruby-forum.com/t/cant-find-rails-after-re-installing-upgrading-kubuntu/121236/3 "2007-11-26T12:58:38Z")
you will have to reinstall all the dependencies once again… ---
**Author:** ![JSPablo\_FernSSSSnd](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/e9bcb4/32.png) [@JSPablo\_FernSSSSnd](https://www.ruby-forum.com/u/JSPablo_FernSSSSnd)\ **Post date:** [November 26, 2007, 8:13pm UTC](https://www.ruby-forum.com/t/cant-find-rails-after-re-installing-upgrading-kubuntu/121236/4 "2007-11-26T20:13:58Z")
Hello, On Monday 26 November 2007 09:20:35 ghoti wrote: > What does it environment.rb say in the project that works? Ooops, I forgot: RAILS\_GEM\_VERSION = ‘1.2.4’ unless defined? RAILS\_GEM\_VERSION Same I’ve put on the other one. Thanks. ---
**Author:** ![JSPablo\_FernSSSSnd](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/e9bcb4/32.png) [@JSPablo\_FernSSSSnd](https://www.ruby-forum.com/u/JSPablo_FernSSSSnd)\ **Post date:** [November 26, 2007, 8:14pm UTC](https://www.ruby-forum.com/t/cant-find-rails-after-re-installing-upgrading-kubuntu/121236/5 "2007-11-26T20:14:33Z")
On Monday 26 November 2007 11:58:38 Dhaval P. wrote: > you will have to reinstall all the dependencies once again… What dependencies? ---
**Author:** ![JSPablo\_FernSSSSnd](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/e9bcb4/32.png) [@JSPablo\_FernSSSSnd](https://www.ruby-forum.com/u/JSPablo_FernSSSSnd)\ **Post date:** [November 29, 2007, 11:36pm UTC](https://www.ruby-forum.com/t/cant-find-rails-after-re-installing-upgrading-kubuntu/121236/6 "2007-11-29T23:36:30Z")
Hello, Just for the record, I kind of solved it. I used a program called meld to make a recursive comparition and aside minor differences in boot.rb, I’ve noticed than now, the new projects, contain a copy of rails while the old didn’t. I’ve just made the copy and it worked.