Hi everyone, I recently upgraded my system from OpenHAB 3.4.2 to 4.1.0-RC1 and encountered some issues with my rules. Specifically, two of my rules were throwing errors related to incompatible units. The error messages I received were pretty cryptic, and I wasn’t sure where to start troubleshooting. I decided to share my experience in case others are facing similar challenges.
First, I noticed the errors in my logs:
text
15:27:02.528 [ERROR] [.internal.handler.ScriptActionHandler] - Script execution of rule with UID ‘Global_Heizung-1’ failed: Can not compare incompatible units. in Global_Heizung
15:27:02.534 [ERROR] [.internal.handler.ScriptActionHandler] - Script execution of rule with UID ‘Global_Heizung-2’ failed: Can not compare incompatible units. in Global_Heizung
I quickly realized that these errors were occurring within if loops where I was comparing items. My initial thought was to check the units associated with these items to ensure they were compatible. After some digging, I found that one of the items was using a different unit system than expected, which was causing the mismatch.
To resolve this, I decided to add more detailed logging within my rules to pinpoint exactly where the issue was arising. I also reviewed the OpenHAB documentation to ensure I was using the correct comparison operators and units. After a bit of trial and error, I managed to identify the problematic item and adjust its configuration to match the expected units.
This experience taught me the importance of thorough logging and unit consistency in rule development. I also discovered some useful community resources that provided additional insights into debugging rule errors. If anyone else is struggling with similar issues, I highly recommend checking out the OpenHAB forums and documentation for guidance.
Happy scripting and debugging! Cheers, Justus