To get straight to the point I want to know how to fix this error and understand it, what is an RLException? Why am I getting this? How can I avoid this later? Below I will post what I did step by step:
This is the directory where I have my files
~/Desktop/Research/research_ws
This is the error i'm getting:
RLException: [ddrobot_rviz.launch] is neither a launch file in package [ros_robotics] nor is [ros_robotics] a launch file name
The traceback for the exception was written to the log file
The following are the codes for dd_robot.urdf and ddrobot_rviz.launch respectively:
<robot name="dd_robot">
<!-- Base Link -->
<link name ="base_link">
<visual>
<origin xyz = "0 0 0" rpy = "0 0 0" />
<geometry>
<box size = ".5 .5 .25"/>
</geometry>
</visual>
</link>
</robot>
<!-- values passed by command line input -->
<arg name = "model" />
<arg name = "gui" default ="False" />
<!-- Set these parameters on Parameter Server -->
<param name = "robot_description"
textfile = "$(find ros_robotics)/urdf/$(arg model)" />
<param name = "use_gui" value = "$(arg gui)" />
<!-- Start 3 nodes: joint_state_publisher, robot_state_publisher
rviz -->
<node name = "joint_state_publisher" pkg = "joint_state_publisher"
type = "joint_state_publisher" />
<node name = "robot_state_publisher" pkg = "robot_state_publisher"
type = "state_publisher" />
<node name = "rviz" pkg = "rviz" type = "rviz"
args = "-d $(find ros_robotics)/urdf.rviz"
required = "true" />
</launch>
I do not yet completely understand what is written in the above codes, I'm following the ROS robotics by example book Fairchild.
