RForm boot failure

i check out the source code from svn://andreas-s.net/rforum/trunk/
here is my database.yml:
production:
adapter: mysql
host: localhost
database: rforum
username: root
password: 123

development:
adapter: mysql
host: localhost
database: rforum
username: root
password: 123

test:
adapter: mysql
host: localhost
database: rforum
username: root
password: 123

Here is my failure information:
E:\projects\rforum>rake migrate
(in E:/projects/rforum)
rake aborted!
no such file to load – ferret
E:/projects/rforum/rakefile.rb:9
(See full trace by running task with --trace)
i wonder to know why?

Install ferret:
gem install ferret

Hi Andreas S.:
Thanks for your help, my problem is fixed;
i boot Rforum successfully, but i find some errors in my log file,here
it is:

NoMethodError (You have a nil object when you didn’t expect it!
The error occured while evaluating nil.updated_at):
/app/controllers/feed_controller.rb:42:in render_feed' /app/controllers/feed_controller.rb:10:inglobal’
c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.11.2/lib/action_controller/base.rb:853:in
perform_action_without_filters' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.11.2/lib/action_controller/filters.rb:332:inperform_action_without_benchmark’
c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.11.2/lib/action_controller/benchmarking.rb:69:in
perform_action_without_rescue' c:/ruby/lib/ruby/1.8/benchmark.rb:293:inmeasure’
c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.11.2/lib/action_controller/benchmarking.rb:69:in
perform_action_without_rescue' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.11.2/lib/action_controller/rescue.rb:82:inperform_action’
c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.11.2/lib/action_controller/base.rb:369:in
process_without_session_management_support' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.11.2/lib/action_controller/session_management.rb:116:inprocess’
c:/ruby/lib/ruby/gems/1.8/gems/rails-1.0.0/lib/dispatcher.rb:38:in
dispatch' c:/ruby/lib/ruby/gems/1.8/gems/rails-1.0.0/lib/webrick_server.rb:117:inhandle_dispatch’
c:/ruby/lib/ruby/gems/1.8/gems/rails-1.0.0/lib/webrick_server.rb:83:in
service' c:/ruby/lib/ruby/1.8/webrick/httpserver.rb:104:inservice’
c:/ruby/lib/ruby/1.8/webrick/httpserver.rb:65:in run' c:/ruby/lib/ruby/1.8/webrick/server.rb:173:instart_thread’
c:/ruby/lib/ruby/1.8/webrick/server.rb:162:in start_thread' c:/ruby/lib/ruby/1.8/webrick/server.rb:95:instart’
c:/ruby/lib/ruby/1.8/webrick/server.rb:92:in start' c:/ruby/lib/ruby/1.8/webrick/server.rb:23:instart’
c:/ruby/lib/ruby/1.8/webrick/server.rb:82:in start' c:/ruby/lib/ruby/gems/1.8/gems/rails-1.0.0/lib/webrick_server.rb:69:indispatch’
c:/ruby/lib/ruby/gems/1.8/gems/rails-1.0.0/lib/commands/servers/webrick.rb:59
c:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in
require' c:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.2.5/lib/active_support/dependencies.rb:214:inrequire’
c:/ruby/lib/ruby/gems/1.8/gems/rails-1.0.0/lib/commands/server.rb:28
c:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in
`require’
script/server:3

Although there is no effect, but i still wonder to know why and how
this error occur?

That happens when there are no posts for the Atom feeds. Fixed in 933.