BR-24: A line has no net amount
This code shows up when an electronic invoice is validated. Here is what it means, why it fires, and what to change in the file.
Why this code appears
A line carries no net amount (BT-131). That is the amount added up into the sum of line net amounts.
How to fix it
Fill SpecifiedTradeSettlementLineMonetarySummation/LineTotalAmount on every line: quantity × net unit price, line discounts deducted.
Where it happens
This code comes from EN 16931, the European e-invoicing standard. It concerns business term BT-131.