Back trace

NoMethodError: You have a nil object when you didn't expect it!
You might have expected an instance of Array.
The error occurred while evaluating nil.-
/Library/Ruby/Gems/1.8/gems/activerecord-2.2.2/lib/active_record/connection_adapters/abstract_adapter.rb:159:in `decrement_open_transactions'
/Library/Ruby/Gems/1.8/gems/aslakhellesoy-cucumber-0.1.99.23/bin/../lib/cucumber/rails/world.rb:61:in `__instance_exec0'
/Library/Ruby/Gems/1.8/gems/rspec-1.2.0/lib/spec/matchers/extensions/instance_exec.rb:19:in `send'

env.rb

# Sets up the Rails environment for Cucumber

ENV["RAILS_ENV"] = "test" 
require File.expand_path(File.dirname(__FILE__) + '/../../config/environment')
require 'cucumber/rails/world'
require 'cucumber/formatters/unicode'
require 'webrat'
require 'cucumber/rails/rspec'
require 'webrat/core/matchers'
require 'spec/mocks'

require  File.expand_path(File.dirname(__FILE__) + '/../../spec/honors_helper')
gem 'htmlentities'
require 'htmlentities'

def logger
  ActiveRecord::Base.logger
end

rails.rb

Cucumber::Rails.use_transactional_fixtures
Webrat.configure do |config|
  config.mode=:rails
end

#Seed the DB
Fixtures.reset_cache
fixtures_folder = File.join(RAILS_ROOT, 'spec', 'fixtures')
fixtures = Dir[File.join(fixtures_folder, '*.yml')].map {|f| File.basename(f, '.yml') }
Fixtures.create_fixtures(fixtures_folder, fixtures, {:medinsight_specialty => "Specialty"})