Error on Loading robot parameters

[benekeneb]

Hello,

i'm having a problem trying out the steap_interface using a simulated vector robot.
To launch the interface I use the following comand:
sudo roslaunch piper steap_interface.launch robot:=jaco2 problem:=example_vector

But the execution always crashed immediately on Loading robot parameters. This is the terminal output:

`nvidia@jetson-xavier-2:~/epic_ws$ roslaunch piper steap_interface.launch
... logging to /home/nvidia/.ros/log/1d8a82d6-a751-11eb-bf30-0a401d3f2f6e/roslaunch-jetson-xavier-2-7080.log
Checking log directory for disk usage. This may take a while.
Press Ctrl-C to interrupt
Done checking log file disk usage. Usage is <1GB.

started roslaunch server http://jetson-xavier-2:43041/

SUMMARY

PARAMETERS

• /piper/Qc: 1.0
• /piper/control_inter: 5
• /piper/cost_sigma: 0.005
• /piper/epsilon: 0.1
• /piper/fix_pose_sigma: 0.0001
• /piper/fix_vel_sigma: 0.0001
• /piper/goal_conf: [4.7124, 3.1416, ...
• /piper/goal_pose: [2, -1, -1.5708]
• /piper/obs_check_inter: 5
• /piper/opt_type: LM
• /piper/sdf_file: sdf/empty_sdf.bin
• /piper/start_conf: [-1.92, 1.5, 0.53...
• /piper/start_pose: [0, 0, 0]
• /piper/total_step: 10
• /piper/total_time: 10.0
• /rosdistro: melodic
• /rosversion: 1.14.10

NODES
/
steap_interface (piper/steap_interface)

ROS_MASTER_URI=http://localhost:11311

process[steap_interface-1]: started with pid [7097]
[ INFO] [1619528028.967624684]: Loading robot parameters.
[steap_interface-1] process has died [pid 7097, exit code -11, cmd /home/nvidia/epic_ws/devel/lib/piper/steap_interface __name:=steap_interface __log:=/home/nvidia/.ros/log/1d8a82d6-a751-11eb-bf30-0a401d3f2f6e/steap_interface-1.log].
log file: /home/nvidia/.ros/log/1d8a82d6-a751-11eb-bf30-0a401d3f2f6e/steap_interface-1*.log
all processes on machine have died, roslaunch will exit
shutting down processing monitor...
... shutting down processing monitor complete
done
`

Does anyone have an idea of what is going wrong?
Thanks.