Exercise3.4 in service

[tjdtkadn]

I have no idea why I got this error when I tried to launch my program for exercise 3.4 in service unit2.
Can I get some idea?

Thank you in advance.

[bayodesegun]

Hi @tjdtkadn, welcome to the community!

I think the post below will answer your question, if you are taking the Python course.

ERROR: cannot launch node of type [package/file.py]: can't locate node [file.py] in package [package]

This error is very common when using ROS to launch a python node, either via rosrun or roslaunch. SOLUTION: Does the file file.py… exist in the package package? If not, create it! (Does the package itself exist and is it spelled correctly?). have execute permissions? If not, make it executable by running: chmod +x /path/to/file.py # replace '/path/to/file.py' by the real path of your file

However, if you are on the C++ course (as it seems now), then please check that you have…

• Edited CMakeLists.txt and package.xml as instructed.
• Compiled using catkin_make.
• Run source devel/setup.bash on every terminal window, after catkin_making…

[tjdtkadn]

Thank you! I could fix it following your advice!