Paulo Abreu, Editing the gemspec worked for me
<your ruby installation>/gems/1.8/specifications/radiant-0.8.2.gemspec s.add_runtime_dependency(%q<rack>, [">= 1.0.0","< 1.2.1"]) >>> But with pre-0.9, you can fix the radiant gem spec: >>> >>> <your ruby installation>/gems/1.8/specifications/radiant-0.8.2.gemspec >>> >>> Change the line: >>> s.add_runtime_dependency(%q<rack>, [">= 1.0.0"]) >>> to: >>> s.add_runtime_dependency(%q<rack>, [">= 1.0.0","< 1.1.0"]) Or, You may can edit : (note I received from : Jeff Casimir) /opt/ruby-enterprise-1.8.7-2010.02/lib/ruby/gems/1.8/gems/radiant-0.8.2/vendor/rails/actionpack/lib/action_controller.rb change the gem rack line to 1.1.0. Changing the gemspec should just change the install-time dependencies, not the load time requirements -- unless I'm mistaken. This change to action controller affects the loadtime. On Aug 11, 2010, at 12:06 PM, Paulo Abreu wrote: > Hello, > > I'm trying to install radiant cms version 0.9.0 rc2 in ubuntu with > passenger and rails 2.3.8 and I'm having the following error: > > can't activate rack (~> 1.0.1, runtime) for [], already activated > rack-1.1.0 for ["radiant-0.9.0.rc2"]. > > I have rack 1.0.1 and rack 1.1.0 installed in my system. > > How can I overcame this problem? uninstalling rack 1.1.0 is not an > option since my other rails applications stop to work. > > Regards, > > Paulo Abreu > > ------------------------------------------------- > my gem list: > > *** LOCAL GEMS *** > > actionmailer (2.3.8) > actionpack (2.3.8) > activerecord (2.3.8) > activeresource (2.3.8) > activesupport (2.3.8) > authlogic (2.1.6) > bundler (0.9.26) > rack (1.1.0, 1.0.1) > radiant (0.9.0.rc2) > rails (2.3.8) > rake (0.8.7) > RedCloth (4.2.3) > sqlite3-ruby (1.3.1) > will_paginate (2.3.14)
