Examples 6.8 in unit 6

Hello,

Could anyone help that why this error occurred?

– Configuring incomplete, errors occurred!
See also “/home/user/catkin_ws/build/CMakeFiles/CMakeOutput.log”.
See also “/home/user/catkin_ws/build/CMakeFiles/CMakeError.log”.
Invoking “cmake” failed
user:~/catkin_ws$ source devel/setup.bash
user:~/catkin_ws$ rossrv list | grep MyCustomServiceMessage
user:~/catkin_ws$ my_custom_srv_msg_pkg rospy std_msgs

I can’t figure out the error without the command that caused it. Was it catkin_make? If so, make sure that your packages are built correctly and make sure the workspace compiles correctly before you source or do anything with catkin_ws