error catkin_make .msg files

edit

Hi all!!

I try to create a .msg files to send a value to a program. I follow the tutorials to create the msg file and .msg files, but when i run ' catkin_make' i get the following error:

[ 86%] Built target uno_CORE

[ 91%] Built target uno_Servo

Scanning dependencies of target move

[ 95%] Building CXX object CMakeFiles/move.dir/move.cpp.obj

In file included from /home/emilio/catkin_ws/src/emilio_arduino/firmware/move.cpp:12:0:
/home/emilio/catkin_ws/devel/include/emilio_arduino/Num.h:9:18: fatal error: string: No existe el archivo o el directorio
 #include <string>

compilation terminated.

make[6]: *** [CMakeFiles/move.dir/move.cpp.obj] Error 1

make[5]: *** [CMakeFiles/move.dir/all] Error 2

make[4]: *** [CMakeFiles/move.dir/rule] Error 2

make[3]: *** [move] Error 2

make[2]: *** [emilio_arduino/CMakeFiles/emilio_arduino_firmware_move] Error 2

make[1]: *** [emilio_arduino/CMakeFiles/emilio_arduino_firmware_move.dir/all] Error 2

make: *** [all] Error 2

Invoking "make -j2 -l2" failed

emilio@emilio-N61Vg:~/catkin_ws$ roscd emilio_arduino/

FIRST EDIT

The first opening < i remove by accident. I am using Indigo distro to control servos using an Arduino board.

The message file is:

    Num.msg
    int64 a

And the CmakeLists.txt is:

cmake_minimum_required(VERSION 2.8.3)
project(emilio_arduino)
find_package(catkin REQUIRED COMPONENTS
  rosserial_arduino
  rosserial_client
  std_msgs
  message_generation
  sensor_msgs
  geometry_msgs
)

add_message_files(
   FILES
   Num.msg
   Num1.msg
 )

 generate_messages(
   DEPENDENCIES
   std_msgs
   sensor_msgs
   geometry_msgs
 )


catkin_package(
CATKIN_DEPENDS rosserial_arduino rosserial_client std_msgs message_runtime sensor_msgs geometry_msgs
)

rosserial_generate_ros_lib(
  PACKAGE rosserial_arduino
  SCRIPT make_libraries.py
)

rosserial_configure_client(
     DIRECTORY firmware 
     TOOLCHAIN_FILE ${ROSSERIAL_ARDUINO_TOOLCHAIN}
)

rosserial_add_client_target(firmware move ALL)

rosserial_add_client_target(firmware move-upload)

include_directories(
  ${catkin_INCLUDE_DIRS}
)

Thanks if somebody know what is happening.