Hi @youcanlearn,

This information would be written to `log4j.txt` as part of a stack trace when the expectation is created with one of the `fail` expectation operators (e.g. `expect_or_fail`). When a failure occurs, you would see a `Caused by` log message such as:

Caused by: java.lang.RuntimeException: Expectation violated: {"flowName":"dlt_autoloader_csv_test","verboseInfo":{"expectationsViolated":["valid_max_length"],"inputData":{},"outputRecord":{"col1":"12345678901234567890123456789","col2":"two","_rescued_data":null},"missingInputData":false}}

...which contains a JSON payload such as the one referenced in the docs you linked to.

Additionally, you could find the stack trace with the same messaging in the Event Log within the `error.exceptions` array.

Hope this helps.