## Installed gems
dgs@dgs-laptop:~/code/voyager$ gem list --local

*** LOCAL GEMS ***

(amongst others)
activerecord-oracle_enhanced-adapter (1.2.1, 1.2.0, 1.1.9)

## config/environment.rb
  config.gem 'oracle-enhanced_adapter', :lib => 'activerecord-oracle_enhanced-adapter', :version => '>= 1.2.1'

## Error when starting

dgs@dgs-laptop:~/code/voyager$ script/console
Loading test environment (Rails 2.3.2)
Missing these required gems:
  oracle-enhanced_adapter  >= 1.2.1

You're running:
  ruby 1.8.7.72 at /usr/bin/ruby1.8
  rubygems 1.3.1 at /home/dgs/.gem/ruby/1.8, /usr/lib/ruby/gems/1.8

Run `rake gems:install` to install the missing gems.