1.问题描述
xacro: in-order processing became default in ROS Melodic. You can drop the option.
substitution args not supported: No module named 'rospkg'
when processing file: /root/catkin_ws/src/xarm_ros/xarm_description/urdf/xarm7_robot.urdf.xacro
RLException: while processing /root/catkin_ws/src/xarm_ros/xarm_description/launch/xarm7_upload.launch:
Invalid <param> tag: Cannot load command parameter [robot_description]: command [['/opt/ros/noetic/lib/xacro/xacro', '--inorder', '/root/catkin_ws/src/xarm_ros/xarm_description/urdf/xarm7_robot.urdf.xacro', 'limited:=True']] returned with code [2].
Param xml is <param name="robot_description" unless="$(arg add_gripper)" command="$(find xacro)/xacro --inorder '$(find xarm_description)/urdf/xarm7_robot.urdf.xacro' limited:=$(arg limited)"/>
The traceback for the exception was written to the log file
2.解决办法
安装rospkg
pip install rospkg
