[ros-users] Problems publishing topics

Hi all,

I'm trying to publishing to a topic but I have an absurd problem:

When I use this:

*self.pub = rospy.Publisher('arm_controller/command', JointTrajectory)*
*msg = JointTrajectory()*
*self.pub.publish(msg)*

it does not publish absolutly nothing.

But, if I use the pub.publish inside an infinite loop, it works:

*self.pub = rospy.Publisher('arm_controller/command', JointTrajectory)*
*msg = JointTrajectory()*
*while True:*
*          self.pub.publish(msg)*

I can publish with -rostopic pub- without problems, so it's a code problem?
What I should change?

Best regards
manuel



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