roslaunch 报错：Invalid roslaunch XML syntax: mismatched tag

问题描述

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RLException: Invalid roslaunch XML syntax: mismatched tag: line 20, column 2
The traceback for the exception was written to the log file

问题分析

本次的问题在于launch文件中的内容格式错误，比如少了一半标签

<launch>
	<group ns = ''>
		<node> 
			...
		</node>
	</group>
</launch>

补充标签，保证格式正确即可