I am trying to make this metric\_fu get to work but I am getting a weird error. 

```
braga@braga-laptop:~/prj/dummy_app$ rake metrics:all --trace
(in /home/braga/prj/dummy_app)
rake aborted!
RubyGem version error: chronic(0.6.2 not ~> 0.3.0)
/usr/local/lib/site_ruby/1.8/rubygems.rb:812:in `report_activate_error'
/usr/local/lib/site_ruby/1.8/rubygems.rb:223:in `activate'
/usr/local/lib/site_ruby/1.8/rubygems.rb:258:in `activate'
/usr/local/lib/site_ruby/1.8/rubygems.rb:257:in `each'
/usr/local/lib/site_ruby/1.8/rubygems.rb:257:in `activate'
/usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:33:in `require'
/usr/lib/ruby/gems/1.8/gems/activesupport-2.3.14/lib/active_support/dependencies.rb:182:in `require'
/usr/lib/ruby/gems/1.8/gems/activesupport-2.3.14/lib/active_support/dependencies.rb:547:in `new_constants_in'
/usr/lib/ruby/gems/1.8/gems/activesupport-2.3.14/lib/active_support/dependencies.rb:182:in `require'
/home/braga/prj/dummy_app/Rakefile:12
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2383:in `load'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2383:in `raw_load_rakefile'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2017:in `load_rakefile'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2068:in `standard_exception_handling'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2016:in `load_rakefile'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2000:in `run'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2068:in `standard_exception_handling'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:1998:in `run'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/bin/rake:31
/usr/bin/rake:19:in `load'
/usr/bin/rake:19

```

In Rakefile line 12 all I have done is given `require 'metric_fu'`. I tried uninstalling the chronic gem. Installed separate versions of 0.3.0 and 0.6.2 in all combinations. But still I cannot run the metrics. Any help would be much appreciated.

The rails version and ruby versions I use are

```
braga@braga-laptop:~/prj/dummy_app$ rails --version
Rails 2.3.14
braga@braga-laptop:~/prj/dummy_app$ ruby --version
ruby 1.8.7 (2010-08-16 patchlevel 302) [i686-linux]

```