# Revision history [back]

### Problems spawning PR2

Hi,

I have a problem loading standard gazebo models into the simulator. I am following this guide using a plain vanilla ros hydro installation.

when launching the world with the gas-station I get an timeout error message after the model was downloaded by the script. I can find the downloaded model in the directory ~/.gazebo/models/gas-station/ so the download was successful.

copying the gas-station model to the

roslaunch pr2_gazebo pr2-gasstation.launch

### Problems spawning PR2

Hi,

I have a problem loading standard gazebo models into the simulator. I am following the instructions given in thisthis tutorial guide using .

I have a plain vanilla ros hydro installation.

when launching the installation and followed the tutorial step by step. I ran in some problems I was able to work around. But spawning the PR2 in the newly created world with the gas-station I get fails and I cannot find the reason...

My pr2-gasstation.launch looks like this:

<!-- Convert an timeout error message xacro and put on parameter server -->
<param name="robot_description" command="$(find xacro)/xacro.py$(find pr2_description)/robots/pr2.urdf.xacro" />

<!-- Spawn a robot into Gazebo -->
<node name="spawn_urdf" pkg="gazebo_ros" type="spawn_model" args="-param robot_description -urdf -model pr2" />

<launch>
<!-- We resume the logic in empty_world.launch, changing only the name of the world to be launched -->
<include file="$(find gazebo_ros)/launch/empty_world.launch"> <arg name="world_name" value="$(find pr2_gazebo)/worlds/pr2.world"/>
<!-- more default parameters can be changed here -->
</include>
</launch>


I got this error:

Invalid roslaunch XML syntax: junk after the model was downloaded document element: line 5, column 0


I checked if the comment of line 2 is working on my machine and discovered after resolving the paths by the script. hand that the .urdf seems to be created in the console. Unfortunately line 5 seems to have still a problem...

I also checked if pr2_empty_world.launch is working and I can find the downloaded model in the directory ~/.gazebo/models/gas-station/ so the download was successful.

copying the gas-station model to the

roslaunch pr2_gazebo pr2-gasstation.launchconfirm that this launches the PR2 in an empty world. However, the other predefined scenarios which comes with the ros-hydro-pr2-common e.g. pr2_table_object.launch does not launch properly resulting in the following error:

Invalid <arg> tag: arg 'gui' has already been declared.

Arg xml is <arg default="true" name="gui"/>


I checked all the others but the empty world is the only one which actually launches the simulator with the robot.

Any help is very appreciated. Thank you in advance.

### Problems spawning PR2

Hi,

I have a problem following the instructions given in this tutorial.

I have a plain vanilla hydro installation and followed the tutorial step by step. I ran in some problems I was able to work around. But spawning the PR2 in the newly created world with the gas-station fails and I cannot find the reason...

My pr2-gasstation.launch looks like this:

<!-- Convert an xacro and put on parameter server -->
<param name="robot_description" command="$(find xacro)/xacro.py$(find pr2_description)/robots/pr2.urdf.xacro" />

<!-- Spawn a robot into Gazebo -->
<node name="spawn_urdf" pkg="gazebo_ros" type="spawn_model" args="-param robot_description -urdf -model pr2" />

<launch>
<!-- We resume the logic in empty_world.launch, changing only the name of the world to be launched -->
<include file="$(find gazebo_ros)/launch/empty_world.launch"> <arg name="world_name" value="$(find pr2_gazebo)/worlds/pr2.world"/>
<!-- more default parameters can be changed here -->
</include>
</launch>


I got this error:

Invalid roslaunch XML syntax: junk after document element: line 5, column 0


I checked if the comment command of line 2 is working on my machine and discovered after resolving the paths by hand that the .urdf seems to be created in the console. Unfortunately line 5 seems to have still a problem...

I also checked if pr2_empty_world.launch is working and I can confirm that this launches the PR2 in an empty world. However, the other predefined scenarios which comes with the ros-hydro-pr2-common e.g. pr2_table_object.launch does not launch properly resulting in the following error:

Invalid <arg> tag: arg 'gui' has already been declared.

Arg xml is <arg default="true" name="gui"/>


I checked all the others but the empty world is the only one which actually launches the simulator with the robot.

Any help is very appreciated. Thank you in advance.