Hi Rich.
It works perfect and with the help of Harry and Udo, i understand the problem and the function now.
I have seen the same problem in a post of you:
https://community.openhab.org/t/solved-error-rule-rulename-null/37359
It’s the same problem here by updating items every 0,002 seconds.
After using the timer the error rule:null is gone.
Thank you very much.
Greetings,
Markus
