I create a service for starting launch file.This launch file start a python file which calls other launch files whenever it is necessary.When i start service with : sudo systemctl start name-of-service.service it works fine and all launch files called and do their jobs. But when i reboot the device it is not work properly.I think because it can not launch file. I check the problem with sudo name-of-service-start :

"" roslaunch.core.RLException: [/root/posemate_ws/src/pylon-ros-camera/pylon_camera/launch/pylon_camera_node.launch] is not a launch file name """

I dont understand why it is not work.Is there any guess ?

All the output is pasted below if it helps.

<14>May  7 10:49:02 mobirob: _engine_runner: Using workspace setup file /home/mobirob/posemate_ws/devel/setup.bash
<14>May  7 10:49:02 mobirob: _engine_runner: Launching ROS_HOSTNAME=mobirob-MS-7B98, ROS_IP=, ROS_MASTER_URI=http://127.0.0.1:11311, ROS_HOME=/home/mobirob/.ros, ROS_LOG_DIR=/tmp
ls: cannot access '/etc/ros/noetic/_engine_runner.d/*.xacro': No such file or directory
<14>May  7 10:49:02 mobirob: _engine_runner: Generated launchfile: /tmp/_engine_runner.launch
<14>May  7 10:49:02 mobirob: _engine_runner: Started roslaunch as background process, PID 93447, ROS_LOG_DIR=/tmp
master has started, initiating launch
... logging to /tmp/b74e8d96-aef8-11eb-ab44-2b89ed0f8691/roslaunch-mobirob-MS-7B98-93447.log
Checking log directory for disk usage. This may take a while.
Press Ctrl-C to interrupt
/usr/bin/du: cannot read directory '/tmp/systemd-private-e738669e789f453f9d39f2c5874b720d-bolt.service-hIwuoj': Permission denied
/usr/bin/du: cannot read directory '/tmp/systemd-private-e738669e789f453f9d39f2c5874b720d-systemd-resolved.service-UseM4g': Permission denied
/usr/bin/du: cannot read directory '/tmp/systemd-private-e738669e789f453f9d39f2c5874b720d-systemd-logind.service-SON60g': Permission denied
/usr/bin/du: cannot read directory '/tmp/systemd-private-e738669e789f453f9d39f2c5874b720d-colord.service-G2BgOg': Permission denied
/usr/bin/du: cannot read directory '/tmp/systemd-private-e738669e789f453f9d39f2c5874b720d-systemd-timesyncd.service-I7sKkh': Permission denied
/usr/bin/du: cannot read directory '/tmp/systemd-private-e738669e789f453f9d39f2c5874b720d-upower.service-bmUIDg': Permission denied
/usr/bin/du: cannot read directory '/tmp/systemd-private-e738669e789f453f9d39f2c5874b720d-ModemManager.service-w7eKPf': Permission denied
/usr/bin/du: cannot read directory '/tmp/tracker-extract-files.125': Permission denied
/usr/bin/du: cannot read directory '/tmp/snap.snap-store': Permission denied
Done checking log file disk usage. Usage is <1GB.

started roslaunch server http://mobirob-MS-7B98:44145/

SUMMARY
========

PARAMETERS
 * /rosdistro: noetic
 * /rosversion: 1.15.10

NODES
  /
    engine_runner (pose_filte/engine_runner.py)

ROS_MASTER_URI=http://127.0.0.1:11311

process[engine_runner-1]: started with pid [93463]
-------------------------------------------------------------------------------
... logging to /tmp/b74e8d96-aef8-11eb-ab44-2b89ed0f8691/roslaunch-mobirob-MS-7B98-93463.log
Traceback (most recent call last):
  File "/home/mobirob/posemate_ws/devel/lib/pose_filte/engine_runner.py", line 15, in <module>
    exec(compile(fh.read(), python_script, 'exec'), context)
  File "/home/mobirob/posemate_ws/src/pose_filte/nodes/engine_runner.py", line 41, in <module>
    pylon_camera_starter()
  File "/home/mobirob/posemate_ws/devel/lib/python3/dist-packages/posemate_lite_engine/utils.py", line 120, in pylon_camera_starter
    roslaunch_file = [(roslaunch.rlutil.resolve_launch_arguments(cli_args)[0], roslaunch_args)]
  File "/home/mobirob/posemate_ws/src/ros_comm/tools/roslaunch/src/roslaunch/rlutil.py", line 107, in resolve_launch_arguments
    raise roslaunch.core.RLException("[%s] is not a launch file name" % args[0])
roslaunch.core.RLException: [/root/posemate_ws/src/pylon-ros-camera/pylon_camera/launch/pylon_camera_node.launch] is not a launch file name
[engine_runner-1] process has died [pid 93463, exit code 1, cmd /home/mobirob/posemate_ws/devel/lib/pose_filte/engine_runner.py __name:=engine_runner __log:=/tmp/b74e8d96-aef8-11eb-ab44-2b89ed0f8691/engine_runner-1.log].
log file: /tmp ...