What this means: Jarvis couldn't read the pay period end date; it's likely in an unexpected format.
Why this might happen: This often occurs when a CSV has been opened and resaved in Excel, which can reformat dates.
What to do
Open the file in a text editor (not Excel) and check the date format:
βPAPDIS / NEST: should beYYYY-MM-DD(orDD/MM/YYYY)
βNOW:Pensions: should beDD/MM/YYYYIf the dates look wrong, re-export from your payroll system without opening in Excel first
Watch out for Excel
Opening a CSV in Excel and then resaving it is a common cause of date formatting issues. If you need to inspect a CSV, use a plain text editor.
