user:/$ rostopic info /counter
Type: std_msgs/Int32
Publishers: None
Subscribers:
- /topic_subscriber (http://rosdscomputer:34173/)
Hi @15735186087
Not quite sure what exactly your problem is. If it is your own publisher, make sure you run the file again, that publishes. If you somehow killed a publishing node running in the background, switch the chapter and switch back, so everything loads again.
1 Like