Everytime i try to roslaunch udacitybot udacityworld.launch, i get this!

PARAMETERS

• /jointstatepublisher/use_gui: False

• /robot_description: <?xml version="1....

• /rosdistro: kinetic

• /rosversion: 1.12.7

• /usesimtime: True

NODES /

gazebo (gazebo_ros/gzserver)

gazebo_gui (gazebo_ros/gzclient)

joint_state_publisher (joint_state_publisher/joint_state_publisher)

robot_state_publisher (robot_state_publisher/robot_state_publisher)

rviz (rviz/rviz)

urdf_spawner (gazebo_ros/spawn_model)

auto-starting new master

process[master]: started with pid [19839]

ROSMASTERURI=http://localhost:11311

setting /run_id to f1667714-6330-11eb-9cdc-000c29954203

process[rosout-1]: started with pid [19852]

started core service [/rosout]

process[jointstatepublisher-2]: started with pid [19861]

process[robotstatepublisher-3]: started with pid [19863]

process[gazebo-4]: started with pid [19866]

process[gazebo_gui-5]: started with pid [19872]

process[urdf_spawner-6]: started with pid [19890]

process[rviz-7]: started with pid [19907]

SpawnModel script started

[INFO] [1612034743.152974, 0.000000]: Loading model XML from ros parameter

[INFO] [1612034743.154839, 0.000000]: Waiting for service /gazebo/spawnurdfmodel

[ INFO] [1612034743.216326606]: Finished loading Gazebo ROS API Plugin.

[ INFO] [1612034743.217305741]: waitForService: Service [/gazebo/setphysicsproperties] has not been advertised,

waiting...

[ INFO] [1612034743.714590703, 1517.368000000]: waitForService: Service [/gazebo/setphysicsproperties] is now

available.

[ INFO] [1612034743.751564580, 1517.401000000]: Physics dynamic reconfigure ready.

[INFO] [1612034743.760539, 1517.409000]: Calling service /gazebo/spawnurdfmodel

[robotstatepublisher-3] process has died [pid 19863, exit code -11, cmd

/opt/ros/kinetic/lib/robotstatepublisher/robotstatepublisher _name:=robotstate_publisher

_log:=/home/robond/.ros/log/f1667714-6330-11eb-9cdc-000c29954203/robotstate_publisher-3.log].

log file: /home/robond/.ros/log/f1667714-6330-11eb-9cdc-000c29954203/robotstatepublisher-3*.log

I can't find the file robotstatepublisher-3.log!

here's my udacity_world.launch file

<arg name="world_name" value="$(find udacity_bot)/worlds/jackal_race.world"/>

<arg name="paused" value="$(arg paused)"/>

<arg name="use_sim_time" value="$(arg use_sim_time)"/>

<arg name="gui" value="$(arg gui)"/>

<arg name="headless" value="$(arg headless)"/>

<arg name="debug" value="$(arg debug)"/>

<!--spawn a robot in gazebo world-->

<node name="urdfspawner" pkg="gazeboros" type="spawn_model" respawn="false"

output="screen" args="-urdf -param robotdescription -model udacitybot"/>

<!--launch rviz-->

Here's my robot_description.launch file

<param name="robot_description" command="$(find xacro)/xacro --inorder '$(find

udacitybot)/urdf/udacitybot.xacro'" />

<param name="use_gui" value="false"/>

<node name="robotstatepublisher" pkg="robotstatepublisher" type="robotstatepublisher" respawn="false"

output="screen"/>

can someone please help me and tell me what's wrong or what should i do?