noMessagesReceived(unit10)

Course Support ROS Basics In 5 Days (Python)
1

Hello,

I launched the file (roslaunch iri_wam_aff_demo start_demo.launch) in shell1. However, I can’t see anything in shell two (rostopic echo /joint_states -n1)

user:~$ rostopic echo /joint_states -n1
WARNING: no messages received and simulated time is active.
Is /clock being published?

2

Hi, try relaunching the command and then checking that the topic exists with rostopic list