BR-CO-16: Amount due for payment mismatch
Severity: error
What it means
Amount due for payment (BT-115) does not equal Invoice total amount with VAT (BT-112) minus Paid amount (BT-113) plus Rounding amount (BT-114).
Most common cause
Often cascades from a BR-CO-15 total-with-VAT mismatch; can also come from PayableAmount being edited independently of TaxInclusiveAmount, PrepaidAmount and PayableRoundingAmount.
How to fix it
Recompute PayableAmount from TaxInclusiveAmount, PrepaidAmount and PayableRoundingAmount at the source and re-issue. Not auto-repaired: arithmetic mismatch, reported expected-vs-found only.