Exercise 3.1_ help :(

Hi, I’m on unit 3 and trying to use the command
rosmsg show / cmd_vel and I compile this:
Unable to load msg [/ cmd_vel]: Cannot locate message [cmd_vel]: unknown package on search path [{‘moveit_resources_panda_moveit_config’:

Could you help me?

Hi, welcome to the community!

It seems like you have a space that shouldn’t be there:

rosmsg show /cmd_vel