ERROR: cannot launch node of type /dynamixel/ROS/Kinetic

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@ct2034:Thanks for your reply! Yes, its installed.the output of rospack find dynamixel_workbench_controllers is: /home/pi/ros_catkin_ws/src/dynamixel-workbench/dynamixel_workbench_controllers

ok, so you want to run it from source. Did you build it?

yes but using roslaunch. since i created a launch file as per the tutorial link i mentioned, but its actually not launching well.

since its on my RPi3 (Raspbian buster platform), and i created this package and launch file while issuing catkin_make , it shows error of not building non-homogeneous packages..... Is that the reason or something else? I had spent lot of time to fix this but failed. plz help. Thanks.

yes. this is the problem then. If you can not build the software, you can not launch it. Maybe you can open a new question to solve your problems with the build

@ct2034: thanks for your suggestions. I rechecked and found that catkin_make is successful but the error is still same. any other things do i need to test to resolve this issue., please suggest!!