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when i am going to run "rostopic echo /cmd_vel" command i get following warning.

cmd_vel

asked 2013-08-16 23:30:29 -0500

pavanpatel
61 ●9 ●11 ●12

WARNING: topic [/cmd_vel] does not appear to be published yet

plz tell me how can i solve this warning....

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answered 2013-08-17 02:16:11 -0500

davinci

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That means that the node publishing to that topic is probably not running. Try rostopic list

(and follow the tutorials)

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answered 2013-08-17 04:54:49 -0500

mozcelikors
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updated 2013-08-17 04:55:08 -0500

I agree with davinci.

Although I'm not sure, please try these:

rostopic echo /gazebo/cmd_vel
rostopic echo /gz/cmd_vel
rostopic echo cmd_vel

If you provide which robot you are trying to drive, we could help you more.

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answered 2013-08-18 20:00:19 -0500

pavanpatel
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Actually i am trying to get communication between ros and labview using labview ros- toolkit.And for that i am using that command.

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Asked: 2013-08-16 23:30:29 -0500

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Last updated: Aug 18 '13

when i am going to run "rostopic echo /cmd_vel" command i get following warning. edit

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when i am going to run "rostopic echo /cmd_vel" command i get following warning.