Module not found error in ROS basics in 5days (Python)

[girishkumar.kannan]

Hi @AshishVarma ,

Another Tip for you: Try put in some effort to read and understand the error messages.
catkin_make’s error messages are very clearly explaining what is wrong during compilation:

@AshishVarma

CMake Warning at /opt/ros/noetic/share/catkin/cmake/catkin_package.cmake:166 (message):
  catkin_package() DEPENDS on 'system_lib' but neither
  'system_lib_INCLUDE_DIRS' nor 'system_lib_LIBRARIES' is defined.
Call Stack (most recent call first):
  /opt/ros/noetic/share/catkin/cmake/catkin_package.cmake:102 (_catkin_package)
  my_subscriber_example_pkg/CMakeLists.txt:104 (catkin_package)


CMake Error at /opt/ros/noetic/share/catkin/cmake/catkin_package.cmake:305 (message):
  catkin_package() include dir 'include' does not exist relative to
  '/home/user/catkin_ws/src/my_subscriber_example_pkg'
Call Stack (most recent call first):
  /opt/ros/noetic/share/catkin/cmake/catkin_package.cmake:102 (_catkin_package)
  my_subscriber_example_pkg/CMakeLists.txt:104 (catkin_package)

All catkin_make dependencies are in CMakeLists.txt file and package.xml file.

If you had understood the above error lines and acted accordingly, you would have solved the issue yourself!

Regards,
Girish

[AshishVarma]

sorry sir

i followed this step and i got confused with this comment “This will NOT be the only thing here”. and i thought that catkin_package() can have all the packages, so thats why i didnt edit anything from this catkin_package().

Thanks for your time and response sir

[girishkumar.kannan]

Hi @AshishVarma ,

@AshishVarma

i followed this step and i got confused with this comment “This will NOT be the only thing here”. and i thought that catkin_package() can have all the packages, so thats why i didnt edit anything from this catkin_package().

Ah, I see. I now understand your confusion.

The other 3 lines in this function is for advanced package creators.
For the basics you require only the CATKIN_DEPENDS line.

Regards,
Girish