/home/ian/.rvm/gems/ruby-1.8.7-p174/gems/ruote-2.1.10/lib/ruote/storage/base.rb:280:in `[]': can't convert String into Integer (TypeError)
        from /home/ian/.rvm/gems/ruby-1.8.7-p174/gems/ruote-2.1.10/lib/ruote/storage/base.rb:280:in `filter_schedules'
        from /home/ian/.rvm/gems/ruby-1.8.7-p174/gems/ruote-2.1.10/lib/ruote/storage/base.rb:280:in `select'
        from /home/ian/.rvm/gems/ruby-1.8.7-p174/gems/ruote-2.1.10/lib/ruote/storage/base.rb:280:in `filter_schedules'
        from /home/ian/.rvm/gems/ruby-1.8.7-p174/gems/ruote-2.1.10/lib/ruote/storage/base.rb:143:in `get_schedules'
        from /home/ian/.rvm/gems/ruby-1.8.7-p174/gems/ruote-2.1.10/lib/ruote/storage/composite_storage.rb:123:in `send'
        from /home/ian/.rvm/gems/ruby-1.8.7-p174/gems/ruote-2.1.10/lib/ruote/storage/composite_storage.rb:123:in `get_schedules'
        from /home/ian/.rvm/gems/ruby-1.8.7-p174/gems/ruote-2.1.10/lib/ruote/worker.rb:141:in `step'
        from /home/ian/.rvm/gems/ruby-1.8.7-p174/gems/ruote-2.1.10/lib/ruote/worker.rb:70:in `run'
        from /home/ian/.rvm/gems/ruby-1.8.7-p174/gems/ruote-2.1.10/lib/ruote/worker.rb:81:in `run_in_thread'
        from /home/ian/.rvm/gems/ruby-1.8.7-p174/gems/ruote-2.1.10/lib/ruote/worker.rb:81:in `initialize'
        from /home/ian/.rvm/gems/ruby-1.8.7-p174/gems/ruote-2.1.10/lib/ruote/worker.rb:81:in `new'
        from /home/ian/.rvm/gems/ruby-1.8.7-p174/gems/ruote-2.1.10/lib/ruote/worker.rb:81:in `run_in_thread'
        from /home/ian/.rvm/gems/ruby-1.8.7-p174/gems/ruote-2.1.10/lib/ruote/engine.rb:55:in `initialize'