# Can't activate activerecord since already activated

**URL:** <https://www.ruby-forum.com/t/cant-activate-activerecord-since-already-activated/161213>\
**Category:** Rails\
**Created:** [February 24, 2009, 11:33am UTC](https://www.ruby-forum.com/t/cant-activate-activerecord-since-already-activated/161213 "2009-02-24T11:33:41Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![pinky](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/p/3d9bf3/32.png) [@pinky](https://www.ruby-forum.com/u/pinky)\
**Post date:** [February 24, 2009, 11:33am UTC](https://www.ruby-forum.com/t/cant-activate-activerecord-since-already-activated/161213/1 "2009-02-24T11:33:41Z")

</div>

=\> Booting Mongrel (use ‘script/server webrick’ to force WEBrick)  
=\> Rails 2.1.2 application starting on [http://0.0.0.0:3000](http://0.0.0.0:3000)  
=\> Call with -d to detach  
=\> Ctrl-C to shutdown server  
\*\* Starting Mongrel listening at 0.0.0.0:3000  
\*\* Starting Rails with development environment…  
Exiting  
C:/svs/InstantRails-2.0-win/ruby/lib/ruby/site\_ruby/1.8/rubygems.rb:319:in  
`acti vate': can't activate activerecord (= 2.0.2), already activated activerecord-2.1 .2] (Gem::Exception) from C:/svs/InstantRails-2.0-win/ruby/lib/ruby/site_ruby/1.8/rubygems/cu stom_require.rb:31:in `require’  
from  
C:/svs/InstantRails-2.0-win/rails\_apps/trunk/vendor/rails/activesup  
port/lib/active\_support/dependencies.rb:510:in `require' from C:/svs/InstantRails-2.0-win/rails_apps/trunk/vendor/rails/activesup port/lib/active_support/dependencies.rb:355:in `new\_constants\_in’  
from  
C:/svs/InstantRails-2.0-win/rails\_apps/trunk/vendor/rails/activesup  
port/lib/active\_support/dependencies.rb:510:in `require' from C:/svs/InstantRails-2.0-win/rails_apps/trunk/vendor/rails/activerec ord/lib/active_record.rb:44 from C:/svs/InstantRails-2.0-win/ruby/lib/ruby/site_ruby/1.8/rubygems/cu stom_require.rb:27:in `gem\_original\_require’  
from  
C:/svs/InstantRails-2.0-win/ruby/lib/ruby/site\_ruby/1.8/rubygems/cu  
stom\_require.rb:27:in `require' from C:/svs/InstantRails-2.0-win/rails_apps/trunk/vendor/rails/activesup port/lib/active_support/dependencies.rb:510:in `require’  
… 35 levels…  
from  
C:/svs/InstantRails-2.0-win/rails\_apps/trunk/vendor/rails/railties/  
lib/commands/server.rb:39  
from  
C:/svs/InstantRails-2.0-win/ruby/lib/ruby/site\_ruby/1.8/rubygems/cu  
stom\_require.rb:27:in `gem_original_require' from C:/svs/InstantRails-2.0-win/ruby/lib/ruby/site_ruby/1.8/rubygems/cu stom_require.rb:27:in `require’  
from script/server:3

As given i tried “gem cleanup” though it cleaned the already installed  
gems it gives the same error as above…

Could anyone help me out???

---

<div class="post-metadata">

**Author:** ![pinky](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/p/3d9bf3/32.png) [@pinky](https://www.ruby-forum.com/u/pinky)\
**Post date:** [February 24, 2009, 12:19pm UTC](https://www.ruby-forum.com/t/cant-activate-activerecord-since-already-activated/161213/2 "2009-02-24T12:19:28Z")

</div>

check installed gems, frozen rails in vendor and environment-entry for  
matching version.

which rails version do you intend to use?