Payment is not generated

My payments are not showing in QuickBooks.

I can successfully create and update Clients. I can also successfully create and update invoices. I cannot create payments. But here's what, when I execute the Update command on my Payment object, I get the correct ID and Domain (NG) that gets passed back. I checked the sync log file (IntuitSyncManagerLogger.log) after running Sync, but it has no error messages. Everything looks fine, there is simply no payment associated with the invoice in QuickBooks.

I believe I am setting all the required fields, but I am not sure about two of them.

1) PaymentLine has a field named TxnId. I am setting it as Id and Domain InvoiceHeader but not sure if this is correct.

2) There is another required field (in the documentation) but I leave it blank as I don't know what to fill in. This is the DiscountAccountId field. I don’t need invoice-related discount.

Here is my code ...

SqlConnection connection = new SqlConnection(m_connectionString);
connection.Open();

SqlCommand cmd = new SqlCommand("dbo.Intuit_GetPayment", connection);
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.Add("@glmvSyncId", SqlDbType.Int).Value = glmvSyncId;

SqlDataReader rdr = cmd.ExecuteReader();
rdr.Read();

Intuit.Ipp.Data.Qbd.PaymentHeader paymentHeader = new Intuit.Ipp.Data.Qbd.PaymentHeader();
paymentHeader.ARAccountId = new Intuit.Ipp.Data.Qbd.IdType() {
    idDomain = Intuit.Ipp.Data.Qbd.idDomainEnum.QB,
    Value = "37"
};
paymentHeader.ARAccountName = "Accounts Receivable";
paymentHeader.DepositToAccountId = new Intuit.Ipp.Data.Qbd.IdType() {
    idDomain = Intuit.Ipp.Data.Qbd.idDomainEnum.QB,
    Value = "35"
};
paymentHeader.DepositToAccountName = "Undeposited Funds";
paymentHeader.CustomerId = new Intuit.Ipp.Data.Qbd.IdType() {
    idDomain = (rdr["cust_iddomain"].ToString() == "QB" ? Intuit.Ipp.Data.Qbd.idDomainEnum.QB : Intuit.Ipp.Data.Qbd.idDomainEnum.NG),
    Value = rdr["cust_idvalue"].ToString()
}; // cust_iddomain and cust_idvalue are from the Customer
paymentHeader.DocNumber = rdr["invoicekey"].ToString();
paymentHeader.TxnDate = DateTime.Now; 

List<Intuit.Ipp.Data.Qbd.PaymentLine> listLine = new List<Intuit.Ipp.Data.Qbd.PaymentLine>();

var paymentLine = new Intuit.Ipp.Data.Qbd.PaymentLine();
paymentLine.Amount = Convert.ToDecimal(rdr["amount"]);
paymentLine.TxnId = new Intuit.Ipp.Data.Qbd.IdType() {
    idDomain = (rdr["invc_iddomain"].ToString() == "QB" ? Intuit.Ipp.Data.Qbd.idDomainEnum.QB : Intuit.Ipp.Data.Qbd.idDomainEnum.NG),
    Value = rdr["invc_idvalue"].ToString()
}; // invc_iddomain and invc_idvalue are from the InvoiceHeader

listLine.Add(paymentLine);

Intuit.Ipp.Data.Qbd.Payment syncPayment = new Intuit.Ipp.Data.Qbd.Payment();
syncPayment.Header = paymentHeader;
syncPayment.Line = listLine.ToArray();

connection.Close();

Intuit.Ipp.Data.Qbd.Payment resultPayment = new Intuit.Ipp.Data.Qbd.Payment();

resultPayment = commonService.Add(syncPayment);

      

        
        
        
      

    

I suspect the problem is with TxnId.

All I do is create a Client and then create an invoice for a Client and then create a Payment for an invoice. Am I missing an object?

Any help is greatly appreciated.