# File lib/ramaze/log/logging.rb, line 81
    def error(ex)
      if ex.respond_to?(:exception)
        message = ex.backtrace
        message.map!{|m| m.to_s.gsub(/^#{Regexp.escape(Dir.pwd)}/, '.') }
        message.unshift(ex.inspect)
      else
        message = ex.to_s
      end
      tag_log(:error, :to_s, *message)
    end