I cannot run rails -v

You are running a wrong version of activesupport (RubyGem version error: activesupport(1.4.2 not = 2.0.2) (Gem::LoadError))

Have you tried "gem install activesupport" ?

I should look like this:

actionmailer (2.0.2)
actionpack (2.0.2)
actionwebservice (1.2.6)
activerecord (2.0.2)
activeresource (2.0.2)
activesupport (2.0.2)

Try this:

gem update --system
gem update --source http://gems.rubyonrails.org

try

gem install activeresource --source http://gems.rubyonrails.org

Jamal Soueidan wrote:

Jochen Kaechelin wrote:

from /Library/Ruby/Site/1.8/rubygems.rb:335:in `activate'
from /Library/Ruby/Site/1.8/rubygems.rb:65:in
`active_gem_with_options'
from /Library/Ruby/Site/1.8/rubygems.rb:50:in `gem'
from /Library/Ruby/bin/rails:15

try

gem install activeresource --source http://gems.rubyonrails.org

--
Jochen

Thank you very much :slight_smile:

I'm having the same problem but i get: Error installing activeresource:
  invalid gem format for
/Library/Ruby/Gems/1.8/cache/activesupport-2.1.0.gem
when i try to install active support.