error invalid roslaunch xml syntax
launch file:
<launch>
<node pkg = "hello_ros" type = "talker.py" name = "talker"/>
<node pkg = "hello_ros" type = "listener.py" name = "listener" output = "screen"/>
<remap to = "chatter" from ="singing"/>
</node>
</launch>
output: Invalid roslaunch XML syntax: mismatched tag: line 9, column 6 The traceback for the exception was written to the log file