[Eldar9x]

Попробуйте в этом методе

display Name emplLastName()
{
    DirPartyTable   dirPartyTable;
    EmplTable       emplTable;
    Name            _name;
projInvoiceEmpl projInvoiceEmplloc;
projInvoiceJour projInvoiceJourloc;

    ;


    select lastName from dirPartyTable
        join PartyId from emplTable
            where dirPartyTable.PartyId == emplTable.PartyId
        join EmplId from projInvoiceEmplloc
            where emplTable.EmplId      == projInvoiceEmplloc.EmplId &&
projInvoiceEmplloc.transid ==projInvoiceEmpl.transid 
        join ProjinvoiceID from projInvoiceJourloc
            where   projInvoiceJourloc.ProjInvoiceId == projInvoiceEmplloc.ProjInvoiceId &&
                    projInvoiceJourloc.invoiceDate == projInvoiceEmplloc.InvoiceDate &&;

     _name = dirPartyTable.LastName;
    return  _name;
    
    
}