xacro: in-order processing became default in ROS Melodic. You can drop the option.
XML parsing error: not well-formed (invalid token): line 1, column 18
when processing file: /home/lx/fourcar/src/smartcar_description/urdf/smartcar.urdf.xacro
Check that:
- Your XML is well-formed
- You have the xacro xmlns declaration: xmlns:xacro="http://www.ros.org/wiki/xacro"
RLException: Invalid tag: Cannot load command parameter [robot_description]: command [['/opt/ros/noetic/lib/xacro/xacro', '-i', '/home/lx/fourcar/src/smartcar_description/urdf/smartcar.urdf.xacro']] returned with code [2].
Param xml is
The traceback for the exception was written to the log file
麻烦问下这个怎末解决 用--inorder 也不行
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