That eliminated the 256 error in the lua scripts. There is a new error though.

2026-02-23 01:48:09.078 Error: SQLHelper: Error script not found '/lua/script_device_foyerlight.lua'

This is the lua script code:

commandArray = {}

if (devicechanged['Foyer Light'] == 'On') then
os.execute('sudo ...

I think I figure it out. Type has to be oneshot and RemainAfterExit=yes so ExecStop is not called immediately.

[Unit]
Description=Domoticz Home Automation Service
After=network-online.target

[Service]
Type=oneshot
User=pi
Group=pi
WorkingDirectory=/home/pi/domoticz
ExecStart=/home/pi/domoticz ...

It has to run in a shell. Its the heyu program which is used to run x10 devices. Its not providingng an error code when its run in a terminal. I am not aware of any other way to do this. It works. It's just annoying to see the errors in the log.

I switched all the scripts to lua:

#!/usr/bin/lua ...

The systemd script in /etc/systemd/system is:
[Unit]
Description=Domoticz Home Automation Service
After=network-online.target

[Service]
Type=simple
User=pi
Group=pi
WorkingDirectory=/home/pi/domoticz
ExecStart=/home/pi/domoticz/domoticz -daemon -www 8080 -sslwww 443 -pidfile /var/run/domoticz ...

Its expanded to
The device is working. I can turn it on and off via lua or python script. However, I get the 256 error in the logs for the python version of the script.

Well, my scripts did not follow the naming convention. When I changed the name to "script_device_halllight.lua", it worked. I wish we had better error logging. Did the same for the python version and it worked, however, the python version is returning error 256.

From the log:
2026-02-22 13:09:30 ...

If I run a regular python script (via the web UI) without using any domoticz variables, there is no error. It's like my python scripts are not seeing the domoticz python module. I get an error code 256 if I try to import DomticzEvents as DE.

I wish to be able to use domoticz variables in lua or ...