Hi i am having an Issue with the section and exercise on custom message generation in chapter 4.
I copied the code from the solution after not being able to get everything to work by myself but i experienced the same issue with the copied code as my own solution.
the catkins_make process compiles without Errors,
i can find the custom message Age when executing rosmsg list.
But when i run the publisher neither the topic is created and neither can i read the topic with rostopic echo.
I verified that the problems comes from importing the custom message.
If i use a standard message everything works fine. But as soon as i import the custom message (while still trying to only publish the standart message) the publisher stops working.
There is no error generated when executing the package.
Could you please verify that your example code is working correctly? Again i copy pasted everything, no error in the build process, no errors on package execution…so I am a bit helpless