roslaunch won't run node

asked 2016-06-27 23:45:43 -0600

daalt gravatar image

I have a node that I can run successfully using:

rosrun <package> <node_name>

In my particular case, my package is called "robot_arm" and node is "ReceiveOrder":

rosrun robot_arm ReceiveOrder

However, ReceiveOrder crashes when I try to run it via a launch file:

<launch>

    <rosparam command="load" file="$(find dispatcher)/dispatcher.yaml"/>
    <rosparam command="load" file="$(find robot_arm)/robot.yaml"/>

    <node name="ReceiveOrder" pkg="robot_arm" type="ReceiveOrder.py" output="screen"/>

</launch>

The error I get from running the launch file is as follows below. Why is this happening?

started roslaunch server http://HPLaptop:39521/

SUMMARY
========

PARAMETERS
 * /motion_planning/orient_tolerance: 0.05
 * /motion_planning/planning_engine: LBKPIECEkConfigDe...
 * /motion_planning/position_tolerance: 0.05
 * /motor_controller/num_motors: 6
 * /motor_controller/rate: 50
 * /order_timeout: 60
 * /robot/feedback_rate: 10
 * /robot/robot_id: 1
 * /robot/robot_timeout: 20
 * /rosdistro: indigo
 * /rosversion: 1.11.19

NODES
  /
    ReceiveOrder (robot_arm/ReceiveOrder.py)

ROS_MASTER_URI=http://localhost:11311

core service [/rosout] found
process[ReceiveOrder-1]: started with pid [13096]
[ReceiveOrder-1] process has died [pid 13096, exit code -11, cmd /home/altemir/ar01/src/robot_arm/src/ReceiveOrder.py __name:=ReceiveOrder __log:=/home/altemir/.ros/log/a6ba0c8e-3cda-11e6-a0d0-002315aba7e4/ReceiveOrder-1.log].
log file: /home/altemir/.ros/log/a6ba0c8e-3cda-11e6-a0d0-002315aba7e4/ReceiveOrder-1*.log
all processes on machine have died, roslaunch will exit
shutting down processing monitor...
... shutting down processing monitor complete
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Comments

gvdhoorn gravatar imagegvdhoorn ( 2016-06-28 01:33:28 -0600 )edit

I try to do it and it works properly. According to me, the error comes from the python script. If the node runs correctly with rosrun, try to run your launch file without the node line to be sure. If it crashes, then it is that you have a problem with the roslaunch, else, it is the python script

lfr gravatar imagelfr ( 2016-06-28 02:41:02 -0600 )edit

This slightly different than http://answers.ros.org/question/23808... although it appears to generate the same exit code -11. In this case, it's the launch file that triggering the error. In the previous thread, the moveit_commander.RobotCommander() line failed.

daalt gravatar imagedaalt ( 2016-06-28 09:32:52 -0600 )edit

Thanks, lfr. Launch file runs fine without <node> line. Why would node run successfully with rosrun but not roslaunch?

daalt gravatar imagedaalt ( 2016-06-28 10:20:30 -0600 )edit

I don't know but it seems there is a problem between roslaunch and your node in runtime. I don't know why but perhaps you have in your python script an instruction which is conflicting with the roslaunch environment. Else, I have no idea.

lfr gravatar imagelfr ( 2016-06-29 02:06:16 -0600 )edit

Were you able to solve this issue ? I am also facing the same problem for another package

sai gravatar imagesai ( 2017-05-05 04:04:35 -0600 )edit