From: Roger Pack <rogerpack2005@...>
Date: 2008-07-08T06:35:23+09:00
Subject: Re: rubygems troubles

> Scenario#3:
> Totally mysterious error messages, heck i run command buildr and get:
> 
> /usr/local/lib/site_ruby/1.8/rubygems.rb:142:in `activate': can't
> activate rubyforge (~> 0.4, runtime), already activated
> rubyforge-1.0.0 (Gem::Exception)
>         from /usr/local/lib/site_ruby/1.8/rubygems.rb:158:in `activate'
>         from /usr/local/lib/site_ruby/1.8/rubygems.rb:157:in `each'
>         from /usr/local/lib/site_ruby/1.8/rubygems.rb:157:in `activate'
>         from /usr/local/lib/site_ruby/1.8/rubygems.rb:49:in `gem'

impossible to 'deactivate' gems currently, AFAIK--you could, however, 
'hard require' the files of another gem, by hand, to 'overwrite' the 
already loaded one.
-R
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