Launches properly in group.

electra_hardware_interface/launch/electra_hardware_interface.launch

 <launch>
 
+    <group ns="/electra">
 
-    <rosparam ns="/electra_ns" file="$(find electra_hardware_interface)/config/controllers.yaml" command="load" />
-    <rosparam ns="/electra_ns" file="$(find electra_hardware_interface)/config/joint_limits.yaml" command="load" />
+        <rosparam file="$(find electra_hardware_interface)/config/controllers.yaml" command="load" />
+        <rosparam file="$(find electra_hardware_interface)/config/joint_limits.yaml" command="load" />
 
-    <arg name="model" default="$(find electra_hardware_interface)/urdf/electra.urdf.xacro" />
-    <param name="/electra_ns/robot_description" command="$(find xacro)/xacro $(arg model)" />
+        <arg name="model" default="$(find electra_hardware_interface)/urdf/electra.urdf.xacro" />
+        <param name="robot_description" command="$(find xacro)/xacro $(arg model)" />
 
-    <node ns="/electra_ns" name="electra_hardware_interface" pkg="electra_hardware_interface" type="electra_hardware_interface" output="screen" />
-    <node ns="/electra_ns" name="robot_state_publisher" pkg="robot_state_publisher" type="robot_state_publisher"></node>
+        <node name="electra_hardware_interface" pkg="electra_hardware_interface" type="electra_hardware_interface" output="screen" />
+        <node name="robot_state_publisher" pkg="robot_state_publisher" type="robot_state_publisher"></node>
 
-    <node ns="/electra_ns" name="controller_spawner" pkg="controller_manager" type="spawner" respawn="false" output="screen" args="
-              --namespace=/electra_ns  
-              /electra_ns/joints_update
-              /electra_ns/velocity_controller
+        <node name="controller_spawner" pkg="controller_manager" type="spawner" respawn="false" output="screen" args="
+              --namespace=/electra  
+              /electra/joints_update
+              /electra/velocity_controller
           " />
 
-    <!-- <node name="controller_spawner" pkg="controller_manager" type="spawner" respawn="false" output="screen" args="
+        <!-- <node name="controller_spawner" pkg="controller_manager" type="spawner" respawn="false" output="screen" args="
           /electra/joints_update
           /electra/force_controller
       " /> -->
-
+    </group>
 
 </launch>
\ No newline at end of file