@MgntMoe I still think you would have to think about your approach. I built an example where in a loop at every iteration there would be a check if in the chunk there would be a row with fault=1. In this case, the faulty lines would be exported to a separate sheet in an Excel file. Otherwise, just the number of fault lines would be shipped.
Maybe you can take a look. It also uses SQLite as a sample database.
kn_example_switch_case_store_file_sql.knwf (158.4 KB)