message class pcl/ModelCoefficients not built, which PCL? [closed]
I'm running the ROS-adapted pcl tutorial "Planar model segmentation" and I got no errors from that node itself. But when trying to look at what the output is, rostopic gives me:
$ rostopic echo -n 1 /seg_plane_model_coeff ERROR: Cannot load message class for [pcl/ModelCoefficients]. Are your messages built?
So when looking for that message I see and nearly empty package and never build messages:
felix@:~$ roscd pcl felix@:/opt/ros/fuerte/share/pcl$ l manifest.xml msg/ felix@:/opt/ros/fuerte/share/pcl$ l msg ModelCoefficients.msg PointIndices.msg PolygonMesh.msg Vertices.msg felix@:/opt/ros/fuerte/share/pcl$ rosmsg show pcl/ModelCoefficients std_msgs/Header header uint32 seq time stamp string frame_id float32[] values felix@:/opt/ros/fuerte/share/pcl$ rosmsg md5 pcl/ModelCoefficients Cannot locate [pcl/ModelCoefficients]
How do I have to install PCL to get it working, and what about those duplicated stacks/packages pcl and perception_pcl?
There are inconsistencies, e.g. you only reach the pcl page by typing it. So, if pcl is not meant do be a package anymore, why do I have that directory?
What is the deb pkg ros-fuerte-perception for?
I just replaced <depend package="pcl"/> with <rosdep name="pcl"/> in my tutorial node, but that doesn't change anything.
Which tutorial page are you using?
pcl/Tutorials, and I see perception_pcl/Tutorials is just a link to the other.
Hi, Felix:
I ran into the same problem with message class for [pcl/ModelCoefficients]
ERROR: Cannot load message class for [pcl/ModelCoefficients]. Are your messages built?
Have you found the solution or walk-around?
Thanks,
CC
No, sorry. Since PCL should be a system dependency in fuerte, but I don't know where the message should be. Have you checked whether the pcl tutorials were updated?
I was not working on my own code, not pcl tutorial. I did make it work by adding rosbuild_genmsg() into CMakeList.txt that may cause the message class to be built. My take is that each message class only needs to be built once. Try it out to see if it helps.