WARNING: no messages received and simulated time is active. Is /clock being published

[Samodine]

first by typing this command "rostopic echo /mon_robot/joint1_position_controller/command" in my terminal i was trying to make sure that gazebo receive the message that i'm sending through a node that i created; this node has a publisher that publish a topic /mon_robot/joint1_position_controller/command. i run rosrun rqt_graph rqt_graph in my terminal, and i saw that i have a connexion between the node that i created, the topic and gazebo. So i don't know why i have this error.

if there is any question i'm listenning.

[Deanna Hood]

Hi @Samodine, I realise you have probably resolved this issue by now, but if anyone else comes across it: there's a chance that the simulation was paused (in which case it won't publish the clock).

[linfeng Dong]

Could I know how do you solve the problem? Becasue I encouter the simliar problem now. It would be grateful if you could help me solve the problem.Thank you.

[Deanna Hood]

Hi there, the issue might be that the simulation is paused. In that case, you can fix it by un-pausing the simulation by clicking on the play button in the Gazebo interface (or by sending a command to Gazebo programmatically). If that doesn’t work, could you please open a new issue with the details of your situation?