Catkin_make doesn't generate .h files from the srv tutorial.

edit

Followed the srv tutorial step by step, catkin_make finishes successfully but the <package_name>/include folder is empty. Any ideas why that might be happening?

Edit: link to the tutorial http://wiki.ros.org/ROS/Tutorials/Cre...

Edit2: What I did basically was to follow the flow of the ROS tutorials. The package containing the service is "beginner_tutorials". After being unsuccessful I decided to create a new empty package "servoservice" to hold the service. Below can be found the xml and the CMakeLists.txt that I used to create the service in "servoservice":

Edit3: Sorry for the formatting, my markdown skills are poor to say the least.

Edit4: The file exists in ROOT_OF_WORKSPACE/devel/include/PKG_NAME but it's empty. Meaning it's an empty .h file.

Edit5: I tried the same sequence on a ubuntu 13.04 machine and the .h file was generated successfully. Could it be the python interpreter? My machine has anaconda python installed.

<?xml version="1.0"?>
<package>
  <name>servoservice</name>
  <version>0.0.0</version>
  <description>The servoservice package</description>

  <maintainer email="ntinos@todo.todo">ntinos</maintainer>

  <license>TODO</license>

  <build_depend>message_generation</build_depend>

  <run_depend>message_runtime</run_depend>

  <buildtool_depend>catkin</buildtool_depend>
  <build_depend>roscpp</build_depend>
  <build_depend>rospy</build_depend>
  <build_depend>std_msgs</build_depend>
  <run_depend>roscpp</run_depend>
  <run_depend>rospy</run_depend>
  <run_depend>std_msgs</run_depend>

  <export>
  </export>
</package>

CMakeLists.txt

cmake_minimum_required(VERSION 2.8.3)
project(servoservice)

find_package(catkin REQUIRED COMPONENTS
  roscpp
  rospy
  std_msgs
  gencpp
  message_generation
)

## Generate services in the 'srv' folder
add_service_files(
   FILES
   AddTwoInts.srv
)

## Generate added messages and services with any dependencies listed here
generate_messages(
   DEPENDENCIES
   std_msgs
 )

catkin_package(
#  INCLUDE_DIRS include
#  LIBRARIES servoservice
#  CATKIN_DEPENDS roscpp rospy std_msgs
#  DEPENDS system_lib
)

## Specify additional locations of header files
## Your package locations should be listed before other locations
# include_directories(include)
include_directories(
  ${catkin_INCLUDE_DIRS}
)

## Declare a cpp library
# add_library(servoservice
#   src/${PROJECT_NAME}/servoservice.cpp
# )

## Declare a cpp executable
# add_executable(servoservice_node src/servoservice_node.cpp)

## Add cmake target dependencies of the executable/library
## as an example, message headers may need to be generated before nodes
# add_dependencies(servoservice_node servoservice_generate_messages_cpp)

## Specify libraries to link a library or executable target against
# target_link_libraries(servoservice_node
#   ${catkin_LIBRARIES}
# )

and the output of the console from the build process:

[  0%] Built target std_msgs_generate_messages_py
[  0%] Built target std_msgs_generate_messages_cpp
[  6%] Built target servo
[  6%] Built target std_msgs_generate_messages_lisp
[ 33%] Built target beginner_tutorials_generate_messages_py
[ 46%] Built target servoservice_generate_messages_py
[ 66%] [ 66%] Built target beginner_tutorials_generate_messages_cpp
Built target servoservice_generate_messages_cpp
[ 73%] Built target servoservice_generate_messages_lisp
[ 86%] Built target beginner_tutorials_generate_messages_lisp
Scanning dependencies of target listener
Scanning dependencies of target talker
Scanning dependencies of target servoservice_generate_messages
Scanning dependencies of target beginner_tutorials_generate_messages
[ 86%] Built target servoservice_generate_messages
[ 86%] Built target beginner_tutorials_generate_messages
[100%] [100%] Building CXX object beginner_tutorials/CMakeFiles/listener.dir/src/listener.cpp.o
Building CXX object beginner_tutorials/CMakeFiles/talker.dir/src/talker.cpp.o
Linking CXX executable /home/ntinos/hydro_ws/devel/lib/beginner_tutorials/talker
Linking CXX executable /home/ntinos/hydro_ws/devel/lib/beginner_tutorials/listener
[100%] Built target talker
[100%] Built target listener

error while building (the second time I run catkin_make it completes successfully):

Traceback (most recent call last):
  File "/opt/ros/hydro/share/gencpp/cmake/../../../lib/gencpp/gen_cpp.py", line ...