Melakukan Function Settlement Otomatis

CustTrans invCustTrans;
CustTrans payCustTrans;
CustTable custTable;
AccountNum invoiceaccount;

/* 0a. Nomor invoice dan nomor payment harus sudah diketahui
       dan di-input pada saat pembuatan jurnalnya
*/

/* 1. Pilih dulu invoice nya, kalo perlu gunakan where AccountNum*/
invoiceaccount = [Kode Customer];

custTable = CustTable::find(invoiceaccount);

Select firstonly invCustTrans
order by TransDate asc
where invCustTrans.Invoice == [InvoiceNumber]
&& invCustTrans.TransType == LedgerTransType::Sales;


    if(invCustTrans) /* 2.Cek bila ada data invoice*/
    {
        //info('invoice '+invCustTrans.Invoice);

        /* 3.Lakukan marking Invoicenya*/
    custVendTransData = CustVendTransData::construct(invCustTrans);
        custVendTransData.markForSettlement(CustTable);

        /* 4.Pilih payment nya*/
    ttsbegin;
        while select payCustTrans
        order by TransDate asc
        where payCustTrans.DocumentNum == [PaymentNumber]
        && payCustTrans.TransType == 0
        && payCustTrans.AccountNum == invCustTrans.AccountNum
        {
            //info('Payment no '+[PaymentNumber]);
       
        /* 5.Lakukan marking paymentnya*/
            custVendTransData = CustVendTransData::construct(payCustTrans);
            custVendTransData.markForSettlement(CustTable);
           
            PaymentDate = [PaymentDate];
        }
        ttscommit;
   
    /* 6. Proses Settlement nya */
    /* SettleDatePrinc::SelectDate, tgl settle diinput (ditentukan) manual */
        CustTrans::settleTransact(custTable, null, true,SettleDatePrinc::SelectDate, PaymentDate);
    }