# File src/ruby_supportlib/phusion_passenger/config/utils.rb, line 98
      def complain_that_multiple_passenger_instances_are_running(instances)
        puts "It appears that multiple #{PROGRAM_NAME} instances are running. Please select"
        puts "a specific one by passing:"
        puts
        puts "  --instance <NAME>"
        puts
        list_all_passenger_instances(instances)
        abort
      end