Attention: Answers.ros.org is deprecated as of August the 11th, 2023. Please visit robotics.stackexchange.com to ask a new question. This site will remain online in read-only mode during the transition and into the foreseeable future. Selected questions and answers have been migrated, and redirects have been put in place to direct users to the corresponding questions on Robotics Stack Exchange. Additional details are available here.

Revision history [back]

You most probably terminate your program immediately after calling pub.publish(msg) so that the publisher has no time to actually send the message. Could you show your code? The hacky solution is to simply wait a bit after sending, you could also check if the other node is listening with pub.getNumSubscribers().

ROS Answers is licensed under Creative Commons Attribution 3.0 Content on this site is licensed under a Creative Commons Attribution Share Alike 3.0 license.