Launching husky_gazebo from another launch file with a different world

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Hi,

I'm trying to launch the husky_gazebo simulation (version 0.4.4) from another launch file and loading it in the Robocup world. The simulation runs successfully but the Robocup world isn't loaded.

Here is the code written in my launch file:

<launch>
    <include file="$(find husky_gazebo)/launch/husky_empty_world.launch">
        <arg name="world_name" value="$(find husky_gazebo)/worlds/robocup14_spl_field.world"/>
    </include>
</launch>

If instead I run directly from the terminal the following line:

roslaunch husky_gazebo husky_empty_world.launch world_name:=worlds/robocup14_spl_field.world

then it works. I don't have any related error or warning shown in the terminal at launch (some PID gains no set but I also get this when launching with the line above in the terminal).

What am I missing ?

Thanks in advance.