get Original Document (purchId..) by 2 ways

LedgerJournalTrans  LedgerJournalTrans;
LedgerJournalTable  LedgerJournalTable;
TmpLedgerBase tmpLedgerBase;
originalDocuments originalDocuments;
VendInvoiceJour VendInvoiceJour;
VendTrans   VendTrans;
select VendTrans where VendTrans.RecId == 68719573210;
Info(strFmt("%1", VendTrans.Invoice));
originalDocuments = new Originaldocuments(VendTrans);
originaldocuments.findRelations();
tmpLedgerBase.setTmpData(originalDocuments.relations());
while select tmpLedgerBase
{
    Info(strFmt("%1", tmpLedgerBase.OriginalDocument));
    if(tmpLedgerBase.OriginalDocument == OriginalDocument::Purchase)
        Info(strFmt("%1", tmpLedgerBase.id));

}
select LedgerJournalTrans where LedgerJournalTrans.VendTransId == 68719573210;
//originalDocuments = new Originaldocuments(LedgerJournalTrans);
//originaldocuments.findRelations();
//tmpLedgerBase.setTmpData(originalDocuments.relations());
//while select tmpLedgerBase
//{
//    Info(strFmt("%1", tmpLedgerBase.id));
//}
select VendInvoiceJour
    where VendInvoiceJour.ledgerVoucher == VendTrans.Voucher
    && VendInvoiceJour.InvoiceAccount == VendTrans.AccountNum
    && VendInvoiceJour.InvoiceDate == VendTrans.TransDate;
Info(strFmt("%1", VendInvoiceJour.PurchId));