Hello,

I do not understand why I get the following message when launching octomap: "Nothing to publish, octree is empty". I have remapped "cloudin" topic to the according pointcloud topic and the fixed frame in the launch file corresponds to the fixed frame in rviz. I have checked my launch file for typos, but the input topic and frameid are written correctly. I ran "rostopic echo points2" (points2 is my remapped input pointcloud topic) and I verified that the pointcloud is indeed being published to this topic. What could the problem be?

Thanks.

<launch>
<node pkg="octomap_server" type="octomap_server_node" name="octomap_server" output="screen" >
    <param name="resolution" value="0.05" />

    <!-- fixed map frame (set to 'map' if SLAM or localization running!) -->
    <param name="frame_id" type="string" value="World" />

    <!-- maximum range to integrate (speedup!) -->
    <param name="sensor_model/max_range" value="5.0" />

    <!-- data source to integrate (PointCloud2) -->
    <remap from="cloud_in" to="points2" />


</node>