I am following the Exercise 3.1 instruction as I copied the code for “simple_topic_publisher.cpp” file,
and in launch directory, my launch file named:simple_topic_publisher_launch_file.launch with the code in the picture below:
I have checked all the launch files and .cpp file are executable.
I know it could be some dummy typo, so I have been checking all the file and node names but I couldn’t fix it. Could you please help me here?
I don’t know what is going on, but I am having the same error for every exercises for all Unit 3 and 4. I can build all the packages by catkin_make 100% successful. But I am always having the same error as above when I run the launch files
Can anyone please help?