Missing the Rails gem. Please `gem install -v=2.3.4 rails`

Posted by Brian Roisentul on Stack Overflow See other posts from Stack Overflow or by Brian Roisentul
Published on 2010-06-01T18:50:06Z Indexed on 2010/06/01 18:53 UTC
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ruby-on-rails

I was trying to fix this error and I ended up with a new one.

I have installed ruby 1.8.6, but using Built-in JRuby 1.4.0 for my app.

Everything was working fine until I updated every gem(as specified by the answer I got from that link) and everything crashed: ever since I tried to start the app I received the following error message:

Missing the Rails 2.3.4 gem. Please gem install -v=2.3.4 rails, update your RAILS_GEM_VERSION setting in config/environment.rb for the Rails version you do have installed, or comment out RAILS_GEM_VERSION to use the latest version installed.

Then, I tried to uninstall the updates(to v2.3.8, most of them), so the last version is 2.3.4.

In my config/environment.rb file I have this:

RAILS_GEM_VERSION = '2.3.4' unless defined? RAILS_GEM_VERSION

so I guess everything is as I left it before the update.

The question is....why do I keep getting the error and I can't start the app?

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