Executable not found in libexec directory

edit

Hi, I'm trying to create a package, but I get an error when I try to launch:

raise SubstitutionFailure(launch.substitutions.substitution_failure.SubstitutionFailure: executable 'server_node.py' not found on the libexec directory '/home/kmriiwa/Skrivebord/ros2_domain_bridge/install/rdb_server/lib/rdb_server'

I'm running Ubuntu 20.04.2 with ROS2 'Foxy'.

Here my launch file:

import os
from ament_index_python.packages import get_package_share_directory
from launch import LaunchDescription
from launch.actions import DeclareLaunchArgument
from launch.actions import IncludeLaunchDescription
from launch.launch_description_sources import PythonLaunchDescriptionSource
from launch.substitutions import LaunchConfiguration
import launch_ros.actions
import sys
from rclpy.utilities import remove_ros_args
import argparse

def generate_launch_description(argv=sys.argv[1:]):

    robot_name = 'tester'
    robot_type = 'mobile'
    server_port = '3001'


    param_dir = LaunchConfiguration(
        'param_dir',
        default=os.path.join(
            get_package_share_directory('rdb_server'),
            'param',
            'bringup.yaml'))

    return LaunchDescription([
        DeclareLaunchArgument(
            'param_dir',
            default_value=param_dir,
            description='Full path to parameter file to load'),

 launch_ros.actions.Node(
            package="rdb_server",
            executable="server_node.py",
            name="server_node",
            output="screen",
            emulate_tty=True,
            arguments=['-name', robot_name,'-type', robot_type, '-p', server_port],
            parameters=[param_dir]),

 ])

Here is my CMakeLists.txt

cmake_minimum_required(VERSION 3.5)
project(rdb_server)

# Default to C99
if(NOT CMAKE_C_STANDARD)
  set(CMAKE_C_STANDARD 99)
endif()

# Default to C++14
if(NOT CMAKE_CXX_STANDARD)
  set(CMAKE_CXX_STANDARD 14)
endif()

if(CMAKE_COMPILER_IS_GNUCXX OR CMAKE_CXX_COMPILER_ID MATCHES "Clang")
  add_compile_options(-Wall -Wextra -Wpedantic)
endif()

# find dependencies
find_package(ament_cmake REQUIRED)
find_package(rclpy REQUIRED)
find_package(std_msgs REQUIRED)
find_package(geometry_msgs REQUIRED)
find_package(nav_msgs REQUIRED)
find_package(sensor_msgs REQUIRED)
find_package(rosidl_default_generators REQUIRED)

# Install the python module for this package
ament_python_install_package(scripts/)

if(BUILD_TESTING)
  find_package(ament_lint_auto REQUIRED)
  ament_lint_auto_find_test_dependencies()
endif()

# Install python scripts
install(
  DIRECTORY launch param scripts
  DESTINATION share/${PROJECT_NAME}
)

install(
  PROGRAMS
    scripts/server_node.py
    scripts/server_sockets.py
    scripts/serializer.py
    scripts/thread_objects.py
    DESTINATION lib/${PROJECT_NAME}
)

ament_package()

The contents of '/home/kmriiwa/Skrivebord/ros2_domain_bridge/install/rdb_server/lib/rdb_server' is as follows:

install/rdb_server/lib/rdb_server
  ->__init__.py
  ->serializer.py
  ->server_node.py
  ->server_sockets.py
  ->thread_objects.py

This error has me puzzled, as the missing file is clearly in the folder its directing me to...

Thanks for any tips!