[Rails 2.3.10] uninitialized constant ActionController::AbstractResponse

I am testing some code under 2.3.10 ( w ruby 1.8.7) and when trying
only to start the console , I get the error :

=====
/gems/activesupport-2.3.4/lib/active_support/dependencies.rb:440:in
`load_missing_constant’:NameError: uninitialized constant
ActionController::AbstractResponse
ruby-1.8.7-p330 :001 >

I cannot see what happen in any log … where or how can i get some
info on the faulty module during initialization ?

( cannot trace the console …
script/console --trace
/Users/yves/.rvm/rubies/ruby-1.8.7-p330/lib/ruby/1.8/optparse.rb:
1450:in `complete’: invalid option: --trace
(OptionParser::InvalidOption)

thanks for your suggestions

erwin