discount on items not part of xml file

[fisfro]

Hello again,

If I have discounts on each item, I will get the expected validation error:
Invoice line net amount MUST equal (Invoiced quantity * (Item net price/item price base quantity) + Sum of invoice line charge amount - sum of invoice line allowance amount
Pfad: /ubl:Invoice/cac:InvoiceLine[1]

because partprice * quantity will be not the position price due the fact that the discount will be not considered.

therefore I have changed the tradeLineItem configuration as following:
TradeLineItem tradeLineItem = new TradeLineItem(pos.Pos.ToString())
{
// lineID = pos.Pos.ToString(),
SellerAssignedID = pos.ArtikelNummer,
Name = pos.Bezeichnung.UnmaskHTMLinString(),
Description = pos.Beschreibung.UnmaskHTMLinString(),
UnitCode = GetQuantityCodes(pos.Einheit), // Mengeneinheit
BilledQuantity = pos.Menge,
NetUnitPrice = pos.PPGesamt / pos.Menge,//pos.EP,
LineTotalAmount = pos.PPGesamt,
TaxPercent = pos.Steuersatz,
TaxType = TaxTypes.VAT,
TaxCategoryCode = GetTaxCategoryCodes(pos.SteuertypID),
BillingPeriodStart = Beleg.LeistungszeitraumBeginn,
BillingPeriodEnd = Beleg.LeistungszeitraumEnde,
};

        // Rabatte zuweisen, falls vorhanden
        if (pos.RabattGesamt > 0)
        {
            tradeLineItem.AddSpecifiedTradeAllowanceCharge(
                isDiscount: true, // Rabatt
                currency: CurrencyCodes.EUR,
                basisAmount: pos.PPGesamt, // Der Basisbetrag, auf den sich der Rabatt bezieht
                actualAmount: pos.RabattGesamt, // Rabattbetrag
                reason: "Rabatt für Position " + pos.Pos // Optional: Grund für den Rabatt
            );
        }
        // TradeLineItem der Beschreibung hinzufügen
        desc.TradeLineItems.Add(tradeLineItem);

so checking the tradeLineItem during adding to list includes the TradeAllowanceCharge, but unfourtunately this information will be not part of the xml-file.

If I change item price to reduced item price and the I will pass the validation but at the end ,the discount information is missing in the invoice, which seems to be a problem- I think.

Do I something wrong or is this part not supported?

Thanks in advance!

Robert