throw error in x++

throw error in x++ :

public void closeOk()

{

    List                ordersToUpdate = new List(typeName2Type(extendedTypeStr(RecId)));

    FormRun             callerForm = element.args().caller();

    MultiSelectionHelper selection = MultiSelectionHelper::createFromCaller(element.args().caller());

    SalesTable          salesTable = selection.getFirst();

    CustTrans           custTrans;

    BankPaymCancel      bankPaymCancel;

    Args                args;

    MCRCustPaymTable    mcrCustPaymTable;

    UserId              User1, User2;

    ABUUserParameter    ABUUserParameter;

    User2 = curUserId();

    User1 = ABUUserParameter::findUser(User2).User;   

    //if(curUserId() != User1)

    if(curUserId() == User1) // test

    {

        if(salesTable.DocumentStatus == DocumentStatus::PackingSlip ||

           salesTable.DocumentStatus == DocumentStatus::PickingList ||

           salesTable.DocumentStatus == DocumentStatus::Invoice ||

           salesTable.DocumentStatus == DocumentStatus::Confirmation) // test

        {

            throw error("Order sudah di packing / picking / invoice, silahkan konfirmasi ke gudang untuk cancel order");

        }

    }

    //end

    while (salesTable)

    {

        ordersToUpdate.addEnd(salesTable.RecId);

        salesTable = selection.getNext();

    }

    SalesUpdateRemain::cancelRemainderOnManySalesOrders(ordersToUpdate.pack());

    salesTable = selection.getFirst();

    while (salesTable && RetailPricingEngine::isMCROrder(salesTable.SalesId))

    {

        mcrCustPaymTable = MCRCustPaymTable::findByRefRecIDRefTableID(salesTable.RecId, salesTable.TableId);

        if(mcrCustPaymTable && mcrCustPaymTable.CustPaymType == MCRCustPaymType::GiftCard)

        {

            while select forUpdate custTrans

                where custTrans.MCRPaymOrderID == salesTable.SalesId

                      && custTrans.CancelledPayment == NoYes::No

            {

                bankPaymCancel = BankPaymCancel::newBankPaymCancel(custTrans, true);

                args = new Args();

                args.caller(bankPaymCancel);

                args.record(custTrans);

                BankPaymCancel::serverRun(args);

            }

        }

        salesTable = selection.getNext();

    }

    if (callerForm)

    {

        callerForm.dataSource().research(true);

    }

    super();

}