Package not found (rospack find: error)

edit

Hello I am using ROS - melodic with ubuntu 18.04 LTS,

I have the following packages in catkin_ws/src directory

catkin_ws/src/rosin_sia10/sia10f_gazebo/launch/sia10f_gazebo.launch

and

catkin_ws/src/rosin_sia10/sia10f_control/config/sia10f_control.yaml

yes I already did setup.bash

However, when I try launching the gazebo file i.e. roslaunch rosin_sia10 sia10f_gazebo.launch

i get the following error,

roslaunch rosin_sia10 sia10f_gazebo.launch
... logging to /home/murtaza/.ros/log/7286922a-a58c-11e9-9062-000c298dc171/roslaunch-ubuntu-10514.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.

inconsistent namespace redefinitions for xmlns:xacro:
 old: http://www.ros.org/wiki/xacro
 new: http://ros.org/wiki/xacro (/home/murtaza/catkin_ws/src/sia10f_description/urdf/sia10f_macro.xacro)
inconsistent namespace redefinitions for xmlns:xacro:
 old: http://www.ros.org/wiki/xacro
 new: http://ros.org/wiki/xacro (/home/murtaza/catkin_ws/src/sia10f_description/urdf/robotcell_macro.xacro)
xacro.py is deprecated; please use xacro instead
Resource not found: sia10f_control
ROS path [0]=/opt/ros/melodic/share/ros
ROS path [1]=/home/murtaza/catkin_ws/src
ROS path [2]=/opt/ros/melodic/share
The traceback for the exception was written to the log file
murtaza@ubuntu:~/catkin_ws/src$ ^C

seems that ros is unable to detect the sia10f_control package within the rosin_sia10

This is my sia10f_gazebo.launch file

<?xml version="1.0"?>

<launch>

  <arg name="sim" default="true" />

  <param name="robot_description" command="$(find xacro)/xacro.py $(find sia10f_description)/urdf/sia10f.gazebo.xacro"/>

  <!-- We resume the logic in empty_world.launch, changing only the name of the world to be launched -->
  <group if="$(arg sim)"> 
    <node name="spawn_sia10f" pkg="gazebo_ros" type="spawn_model" args="-param robot_description -urdf -model sia10f"/>
    <include file="$(find gazebo_ros)/launch/empty_world.launch">
      <arg name="debug" value="false"/>
      <arg name="gui" value="true"/>
      <arg name="paused" value="true"/>
      <arg name="use_sim_time" value="true"/>
      <arg name="headless" value="false"/>
    <!-- more default parameters can be changed here -->
    </include>
    <!--node name="spawn_kinect" pkg="gazebo_ros" type="spawn_model" args="-param robot_description_kinect -urdf -model kinect"/-->
    <node name="spawn_green_box" pkg="gazebo_ros" type="spawn_model" args="-sdf -file $(find sia10f_description)/urdf/models/green_box/model.sdf -x -0.1 -y -0.45 -z 1 -model green_box"/>
    <node name="spawn_red_box" pkg="gazebo_ros" type="spawn_model" args="-sdf -file $(find sia10f_description)/urdf/models/red_box/model.sdf -x 0.1 -y -0.45 -z 1 -model red_box"/>
    <node name="spawn_blue_box" pkg="gazebo_ros" type="spawn_model" args="-sdf -file $(find sia10f_description)/urdf/models/blue_box/model.sdf -x 0.3 -y -0.45 -z 1 -model blue_box"/>
    <node name="spawn_tag_1" pkg="gazebo_ros" type="spawn_model" args="-sdf -file $(find sia10f_description)/urdf/models/tag_1/model.sdf -x 0.0 -y -0.3 -z 1 -model tag_1"/>
    <node name="spawn_tag_2" pkg="gazebo_ros" type="spawn_model" args="-sdf -file $(find sia10f_description)/urdf/models/tag_2/model.sdf -x 0.2 -y -0.3 -z 1 -model tag_2"/>
    <node name="spawn_tag_3" pkg="gazebo_ros" type="spawn_model" args="-sdf -file $(find ...