dave-csc opened a new issue, #6069: URL: https://github.com/apache/hop/issues/6069
### Apache Hop version? 2.16 ### Java version? 17.0.2 ### Operating system Linux ### What happened? **_Probably caused by changes for #5660_**, the interface in **ETL metadata injection** to inject values in a **Merge rows (diff)** transform has changed: as a result, you'll get a warning about missing mappings to be removed. This is what it looked like in Hop 2.15: <img width="971" height="177" alt="Image" src="https://github.com/user-attachments/assets/354f704c-1b32-4a3b-9a1b-9d22ae3db636"; /> This is what it looks like in Hop 2.16: <img width="976" height="346" alt="Image" src="https://github.com/user-attachments/assets/608a80d5-6e82-4e49-8258-c84f06384522"; /> Moreover, the basic log trace reports some errors like: ``` 2025/11/21 02:01:22 - Leggi e confronta file.0 - ERROR: Target key 'VALUE_FIELDS' is not defined in '_loop-update-data-tables' pipeline! 2025/11/21 02:01:22 - Leggi e confronta file.0 - ERROR: Target key 'KEY_FIELDS' is not defined in '_loop-update-data-tables' pipeline! ``` However, it seems that pipelines developed with a previous version of Hop are still working as expected (this needs to be more accurately verified - I will do a comparison test tonight) ### Issue Priority Priority: 2 ### Issue Component Component: Hop Gui, Component: Transforms, Component: Metadata -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
