Cannot create custom message

Question

Hi i am currently trying to create a custom message for an exisitng package however i create Point_id.msg but when i included it as a header file in my code, i receive the following error

/home/111/222/333/find_object_2d/src/objects_detected.cpp:7:41: fatal error:       
find_object_2d/PointObjects.h: No such file or directory
compilation terminated.
make[2]: *** [find_object_2d/CMakeFiles/objects_detected.dir/src/objects_detected.cpp.o] Error 1
make[1]: *** [find_object_2d/CMakeFiles/objects_detected.dir/all] Error 2
make: *** [all] Error 2
Invoking "make" failed

This is what i included in Point_id.msg :

int16 id
geometry_msgs/Point punto

This is my include header in the codes:

#include <find_object_2d/PointObjects.h>
#include <find_object_2d/Point_id.h

In the existing cmakelist.txt there was no sign of # rosbuild_gensrv() so should i create a new package within the existing package and create the .msg files in the src folder and try to build it? or what should i do? i'm really confused.

Please help thank you!

Using `@name` won't work unless the other person posted in that discussion. But sorry, no, never touched that code. — Mario, Jan 12 '15 at 07:55
check @luator answer and this simple tutorial for more info: http://wiki.ros.org/ROS/Tutorials/CreatingMsgAndSrv — alextoind, Jan 12 '15 at 21:59

luator · Answer 1 · 2015-01-12T10:50:46.840

You have to modify the CMakeLists.txt of the package a bit, otherwise the *.h files will not be generated.

If you use rosmake:

Simply add rosbuild_genmsg() to CMakeLists.txt

If you use catkin:

With catkin it is a bit more complicated:

Add "message_generation" to find_package(catkin REQUIRED COMPONENTS ... and

add_message_files(
  FILES
  Point_id.msg
)
generate_messages(
  DEPENDENCIES
  geometry_msgs
)

I hope, this helps.

Cannot create custom message

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