Error incomming payment cash

Question

Hi
I have a problem when create a incoming payment from customer
creating  journal entry, payment, and add the journal entry on the payment
if the invoice is partially paid the payment is created sucessfully
but if the invoice is not paid send a error
error code:-10
description:Enter valid code  [JDT1.ContraAct][line: 1] , 'SN0001'  [??????? 173-36]
here ir the code:
                    //creating journal entry
                    var entry = company.GetBusinessObject(BoObjectTypes.oJournalEntries) as JournalEntries;
                    var cuenta = parametros.CodigoCuentaContableAnticiposClienteExportacion;
                    entry.TaxDate = pago.FechaCreacion;
                    entry.ReferenceDate = pago.FechaCreacion;
                    entry.DueDate = pago.FechaCreacion;
                    entry.Reference = "Aplic Anticipo cliente";
                    entry.Memo = "Aplic ANTICIPO CLIENTE";
                    entry.Reference2 = pago.Codigo.ToString();
                    entry.Lines.ShortName = pago.ClientePago.CardCode;
                    entry.Lines.Credit = (double)pago.Anticipado;
                    entry.Lines.TaxDate = entry.TaxDate;
                    entry.Lines.Add();
                    entry.Lines.SetCurrentLine(1);
                    entry.Lines.ShortName = cuenta;
                    entry.Lines.Debit = (double)pago.Anticipado;
                    entry.Lines.TaxDate = entry.TaxDate;
                    var statusPoliza = entry.Add();
                    if (statusPoliza != 0)
                        return;
                    var polizaAnticipo = company.GetNewObjectKey();
                    //creating payment
                    var payment = company.GetBusinessObject(BoObjectTypes.oIncomingPayments) as Payments;
                    payment.CardCode = client;
                    payment.DocDate = pago.FechaCreacion;
                    payment.DocType = BoRcptTypes.rCustomer;
                    payment.DocCurrency = "MXP"
                    var remarks = pago.PagoFacturas.Aggregate<PagoFactura, string>("",(folios, factura) => folios += "," + FolioImpreso).Substring(1);
                    if (remarks.Length > 50)
                        remarks = remarks.Substring(0, 47) + "...";
                    payment.JournalRemarks = remarks;
                    payment.Remarks = pago.Observaciones.Substring(0, pago.Observaciones.Length >= 254 ? 253 : pago.Observaciones.Length);
                    var pagar = pago.MontoPago
                    payment.CashAccount = pago.TipoMercado == TipoMercado.Exportacion ? "_SYS00000000123" : CodigoCuentaContableRedondeo;
                    payment.CashSum = (double)0.01;                   
                    var line = 0;
                    foreach (var pagoFactura in pago.PagoFacturas)
                        var factura = pagoFactura.FacturaCliente;
                        var folio = "";
                        var monto = 0m;
                        folio = factura.FolioSAP;
                        monto = pagoFactura.Monto
                         if (line != 0)
                            payment.Invoices.Add();
                        payment.Invoices.DocEntry = int.Parse(folio);
                        payment.Invoices.InvoiceType = BoRcptInvTypes.it_Invoice; //BoRcptInvTypes.it_JournalEntry Así se indica que es una poliza
                        payment.Invoices.SumApplied = (double)monto;
                        line++;
                         // add the journal entry on the payment
                        if (line != 0)
                            payment.Invoices.Add();
                        payment.Invoices.DocEntry = int.Parse(polizaAnticipo);
                        payment.Invoices.InvoiceType = BoRcptInvTypes.it_JournalEntry; //Así se indica que es una poliza
                        payment.Invoices.SumApplied = -(double)pago.Anticipado;
                        line++;
                    var status = payment.Add();
I hope that you can help me
i'm usgin .net and DI API 9.0

Answer 1

Gracias por la respuesta alejandro
realmente no es SN0001, lo puse solo de ejemplo
pero el error lo marca en la linea
var status = payment.Add();
y si el error me dice que es algo del asiento contable, pero que se me hace raro es que si la factura ya tiene algo pagado, si registra bien el pago.
y tambien si intento hacer ese mismo pago en sap directamente me marca una advertencia pero si me deja continuar
me dice esto.
a cash account is required, chossing a diferent account may cause inaccurancies in the cash flow report