Stephan,<div><br></div><div>Can you take this to <a href="http://answers.ros.org">answers.ros.org</a>?  And in that question there can you tell us what version of ROS you are using?</div><div><br></div><div>I do not get the same behavior as you:</div>

<div><br></div><div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">∫ rospack depends geometry_msgs<br>cpp_common<br>

rostime<br>roscpp_traits<br>roscpp_serialization<br>genmsg<br>genpy<br>message_runtime<br>std_msgs</blockquote></div><div><br></div><div>--</div><div><br></div><div>P.S. in the future please follow the getting help guidelines:</div>

<div><br></div><div><a href="http://ros.org/wiki/Support">http://ros.org/wiki/Support</a></div><div><br></div><div>Thanks,</div><div><br><div class="gmail_quote">On Thu, Jan 24, 2013 at 6:49 AM, Stephan Opfer <span dir="ltr">&lt;<a href="mailto:opfer@vs.uni-kassel.de" target="_blank">opfer@vs.uni-kassel.de</a>&gt;</span> wrote:<br>

<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi,<br>
<br>
I have some problem in understanding the consistency of the output of the following two commands:<br>
<br>
$rospack depends geometry_msgs:<br>
&lt;nothing&gt;<br>
<br>
$rosmsg packages Header<br>
...<br>
gazebo_msgs<br>
gazebo_plugins<br>
geometry_msgs &lt;--<br>
hpPackage<br>
...<br>
<br>
So geometry_msgs is using the Header message from std_msgs, but geometry_msgs does not depend on std_msgs. One example of using the Header message is geometry_msgs/TwistStamped:<br>
<br>
$rosmsg show geometry_msgs/TwistStamped<br>
std_msgs/Header header<br>
  uint32 seq<br>
  time stamp<br>
  string frame_id<br>
geometry_msgs/Twist twist<br>
  geometry_msgs/Vector3 linear<br>
    float64 x<br>
    float64 y<br>
    float64 z<br>
  geometry_msgs/Vector3 angular<br>
    float64 x<br>
    float64 y<br>
    float64 z<br>
<br>
Isn&#39;t it a bug?<br>
<br>
Best Regards,<br>
  Stephan<br>
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</blockquote></div><br><br clear="all"><div><br></div>-- <br>William Woodall<div>Willow Garage - Software Engineer</div><div><a href="mailto:wwoodall@willowgarage.com" target="_blank">wwoodall@willowgarage.com</a></div>
</div>