Thanks a lot!<div><br><div class="gmail_quote">2011/10/21 Benoit Larochelle <span dir="ltr"><<a href="mailto:Benoit.Larochelle@dfki.de">Benoit.Larochelle@dfki.de</a>></span><br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">

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<div>Hi Manuel.....</div>
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<div>Maybe this post will help you: <a title="http://answers.ros.org/question/2151/how-do-i-publish-exactly-one-message" href="http://answers.ros.org/question/2151/how-do-i-publish-exactly-one-message" target="_blank">http://answers.ros.org/question/2151/how-do-i-publish-exactly-one-message</a></div>

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<div>Benoit</div>
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<div><b>From:</b> <a title="mrodriguez@robotnik.es" href="mailto:mrodriguez@robotnik.es" target="_blank">Manuel Rodríguez</a> </div>
<div><b>Sent:</b> Friday, October 21, 2011 10:35 AM</div>
<div><b>To:</b> <a title="ros-users@code.ros.org" href="mailto:ros-users@code.ros.org" target="_blank">User discussions</a> </div>
<div><b>Subject:</b> [ros-users] Problems publishing topics</div></div></div>
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<div style="font-style:normal;display:inline;font-family:'Calibri';color:#000000;font-size:small;font-weight:normal;text-decoration:none"><div><div></div><div class="h5">Hi 
all, 
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<div>
<div>I'm trying to publishing to a topic but I have an absurd 
problem:</div></div>
<div> </div>
<div>When I use this:</div>
<blockquote style="border-bottom:medium none;border-left:medium none;padding-bottom:0px;margin:0px 0px 0px 40px;padding-left:0px;padding-right:0px;border-top:medium none;border-right:medium none;padding-top:0px">
  <div><i>self.pub = rospy.Publisher('arm_controller/command', 
  JointTrajectory)</i></div>
  <div><i>msg = JointTrajectory()</i></div>
  <div><i>self.pub.publish(msg)</i></div></blockquote>it does not publish 
absolutly nothing. 
<div> </div>
<div>But, if I use the pub.publish inside an infinite loop, it works:</div>
<blockquote style="border-bottom:medium none;border-left:medium none;padding-bottom:0px;margin:0px 0px 0px 40px;padding-left:0px;padding-right:0px;border-top:medium none;border-right:medium none;padding-top:0px">
  <div>
  <div><i>self.pub = rospy.Publisher('arm_controller/command', 
  JointTrajectory)</i></div></div>
  <div>
  <div><i>msg = JointTrajectory()</i></div></div>
  <div>
  <div><i><b>while True:</b></i></div>
  <div><i>          
  self.pub.publish(msg)</i></div></div></blockquote>
<div> </div>
<div> </div>
<div>I can publish with -rostopic pub- without problems, so it's a code problem? 
What I should change?</div>
<div> </div>
<div>Best regards</div>
<div>manuel</div>
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<div> </div>
<div><br><b><br></b></div>
</div></div><p>
</p><hr>
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