Ruby on Rails

Hi there!
Im new on ruby/rails, and im tying to run the  rake task below but I
got an error. After I tested on script/console and I got the same
error. Could you helpe me, please?

Thanks!
Pedro



Rake Task:

namespace :meuApp do
  desc 'Update geotable with longitude and latitude information'
  task :add_geotable_coordinates => :environment do
  include GeoKit::Geocoders
      geotable = Geotable.find_by_sql(["SELECT * FROM geotable WHERE
ADDRESS IS NOT NULL"])
          begin
             geotable.each { |geotable|