The Problem When having a SubInvoiceLine, with InvoicedQuantity = 0 and therefore LineExtensionAmount = 0, the validator returns a [BR-DEX-02]. [BR-DEX-02] Der Wert von "Invoice line net amount" (BT-131) einer "INVOICE LINE" (BG-25) oder einer "SUB INVOICE LINE" (BG-DEX-01) soll der Summe der "Invoice line net amount" (BT-131) der direkt darunterliegenden "SUB INVOICE LINE" (BG-DEX-01) entsprechen. Example for a SubInvoiceLine: ```xml <cac:SubInvoiceLine> <cbc:ID>01.01.0020</cbc:ID> <cbc:InvoicedQuantity unitCode="C62">0</cbc:InvoicedQuantity> <cbc:LineExtensionAmount currencyID="EUR">0</cbc:LineExtensionAmount> <cac:Item> <cbc:Name>Pos01010020</cbc:Name> <cac:ClassifiedTaxCategory> <cbc:ID>S</cbc:ID> <cbc:Percent>19</cbc:Percent> <cac:TaxScheme> <cbc:ID>VAT</cbc:ID> </cac:TaxScheme> </cac:ClassifiedTaxCategory> </cac:Item> <cac:Price> <cbc:PriceAmount currencyID="EUR">2</cbc:PriceAmount> <cbc:BaseQuantity unitCode="C62">1</cbc:BaseQuantity> </cac:Price> </cac:SubInvoiceLine> ``` As far as I understand, the LineExtensionAmount (=0) should not affect other LineExtensionAmounts. Therefore, this warning shouldn't be triggered. There should rather be a warning that there must not be any SubInvoiceLine with LineExtensionAmount = 0. [1XRechnung.xml](/uploads/118f0014404a628b8e58a8dde6474ffb/1XRechnung.xml)