Why it shows unknown substitution command?

edit

I try to use a launch file. But it shows unknown substitution command. I don't know why.

<launch>
    <param name="/use_sim_time" value="true"/>
    <arg name="map_file" default="$(find turtlebot3_navigation)/maps/map.yaml"/>
    <arg name="open_rviz" default="true"/>


    <!-- Run the map server -->
    <node name="map_server" pkg="map_server" type="map_server" args="$(turtlbot3_navigation)/map/map.yaml" >
        <param name="frame_id" value="/map" />
    </node>

    <group ns="robot1">
        <param name="tf_prefix" value="robot1_tf" />
        <param name="amcl/initial_pose_x" value="1" />
        <param name="amcl/initial_pose_y" value="1" />
        <include file="$(find turtlebot3_navigation)/launch/new_move_base.launch" />
    </group>

    <group ns="robot2">
        <param name="tf_prefix" value="robot2_tf" />
        <param name="amcl/initial_pose_x" value="-1" />
        <param name="amcl/initial_pose_y" value="1" />
        <include file="$(find turtlebot3_navigation)/launch/new_move_base.launch" />
    </group>

    <!--node pkg="rviz" type="rviz" name="rviz" args="-d $(find your_pkg)/config/multi.vcg"
          output="screen" -->
    <node pkg="rviz" type="rviz" name="rviz" required="true"
          args="-d $(find turtlebot3_navigation)/rviz/turtlebot3_navigation.rviz"/>
</launch>

The terminal shows:

roslaunch turtlebot3_navigation multiple_navigation.launch 
... logging to /home/ise-admin/.ros/log/406b2672-a176-11e8-841a-509a4c311940/roslaunch-ise-linux-1-6017.log
Checking log directory for disk usage. This may take awhile.
Press Ctrl-C to interrupt
Done checking log file disk usage. Usage is <1GB.

Unknown substitution command [turtlbot3_navigation]. Valid commands are ['find', 'env', 'optenv', 'anon', 'arg']
The traceback for the exception was written to the log file

I can't find the log file in /.ros/log. Do you know why it shows Unknown substitution command?

Thank you!