Debug error Meaning?

[Debbie Erickson 0]

Hi.  I'm getting a strange (to me) error when debugging a project.  The project contains an application and a dll.  I have both subprojects open in a project group.  I have set some breakpoints in a function within the dll.  The functions are initially called from the application.  In the dll's function, I have a local variable that's being assigned to.  Immediately after the assign statement, I tried to inspect what was in the local variable.  The local variable is of a custom-defined class type.  When I hit the breakpoint to see what is in that variable called "vo", I get an error message of "error inspecting vo - expression error"

 

Is this related to my debugger settings? In the project, I turned off optimization.  Can somebody maybe help me understand and fix this?  The first loop checks for a count on a list.  The debugger is showing that the count is 1.  So the assignment of position 0 should have retrieved the data to the local variable of "vo".

 

 

Below the code are my project settings for the debugging.

function UpdateVendOrdCarrier(Order: TsqlOrderRecord; aVendorCode: string = ''; showWarning: boolean = false): boolean;
var
  i: integer;
  j: integer;
  k: integer;
  CurrCarrierType: char;
  CurrCarrier: string;
  CurrShipCode: string;
  CurrShipMinWk: byte;
  CurrShipMaxWk: byte;
  cst: TsqlCustomerRecord;
  vo: TsqlVendOrdRecord;
  ShipToState: string;
  ShipToZip: string;
  //ManualCarrier: boolean;
  vsp: TVendorShippingPointRecord;
  NonStandardWarehouseUsed: boolean;
  nonDefaultWareHouseCarrId: Integer;
  carriers: TCarrierList;
  dcId: string;
  changed: boolean;
  lastUsedDc: string;
  warnings: string;
begin
  changed := FALSE;

  // for all vendors, recheck the Carriers, this could be because of ShipTo Changes
  // or we added an Item that changes the Carrier for this Vendor Order
  result := false;

  for i := 0 to Order.VendOrdList.count - 1 do
  begin
    vo := Order.VendOrdList[i];

    if ((aVendorCode = '') or ((aVendorCode <> '') and (vo.VendorCode.data = aVendorCode)))
      and ((not (vo.RecordState in [rsDelete, rsDeleted]))) // No Changes to invoiced Vendor Orders
      and ((vo.Status.data = ' ') or (Order.OrderType.data = 'Q')) then
    begin

      // Use the Ship To Customer State
      ShipToState := Order.ShipToCustRec.State.data;
      ShipToZip := Order.ShipToCustRec.ZipCode.data;

      // If there is an Installer then use the Installers State
      for k := 0 to Order.CustomerList.count - 1 do
      begin
        if (not (Order.CustomerList[k].RecordState in [rsDelete, rsDeleted])) and (Order.CustomerList[k].TypeCode.data = 'I') then
        begin
          cst := TsqlCustomerRecord.CreateAndLoadCustomer(Order.CustomerList[k].CustomerOID.data);
          ShipToState := cst.State.data;
          ShipToZip := cst.ZipCode.Data;
          FreeAndNil(cst);
          break;
        end;
      end;

      CurrCarrierType := ' ';
      CurrCarrier := vo.ActlCarrier.data;
      //ManualCarrier := (vo.Carrier.data <> '') and (vo.ActlCarrier.data <> '') and
      //  (vo.ActlCarrier.data <> vo.Carrier.data);

//      if uOrderCarrierService.TOrderCarrierService.Instance.ManuallyCarrierChangesOnly(vo, NonStandardWarehouseUsed) then
//        CurrCarrierType := vo.CarrierType.data;

      CurrShipCode := vo.ShipCode.data;
      CurrShipMinWk := vo.ShipMinWk.data;
      CurrShipMaxWk := vo.ShipMaxWk.data;

      NonStandardWarehouseUsed := false;
      vsp := vo.VendorRecord.ShippingPointList.GetShippingPoint(ShipToState);

      lastUsedDc := '';
      if not assigned(vsp) then
      begin
        //        ShipToState := CurrentLocation.CoAddr.State.data;
        vsp := vo.VendorRecord.ShippingPointList.GetShippingPoint(CurrentLocation.CoAddr.State.data);
      end;

      for j := 0 to vo.VendDtlList.Count - 1 do
      begin
        if assigned(vsp) and (vo.VendorCode.data = 'TDQ') and
           (vsp.DCIdentifier.data <> vo.VendDtlList[j].DCIdentifier.data) then
        begin
          if WarehouseManagementSystem.DCCanShip(vsp.DCIdentifier.Data) and
            WarehouseManagementSystem.DCCanShip(vo.VendDtlList[j].DCIdentifier.data) then
          begin
            if (not TCarrierList.IsCollectCarrier(vo.ActlCarrier.Data)) then
              NonStandardWarehouseUsed := true; // <> 'CLCT';
            dcId := vo.VendDtlList[j].DCIdentifier.data;
          end
          else if WarehouseManagementSystem.DCCanShip(vo.VendDtlList[j].DCIdentifier.data) then
          begin
            if (length(lastUsedDc) > 0) and (lastUsedDc <> vo.VendDtlList[j].DCIdentifier.data) then
              NonStandardWarehouseUsed := True
            else if not WarehouseManagementSystem.DCUsesCarrier(vo.VendDtlList[j].DCIdentifier.data,
              vo.ActlCarrier.data) then
              NonStandardWarehouseUsed := True;
            lastUsedDc := vo.VendDtlList[j].DCIdentifier.data;

          end;
        end;
      end;

      if (assigned(vo.VendOrdLastMileCarrierRecord) and
         (not string.IsNullOrWhiteSpace(vo.VendOrdLastMileCarrierRecord.ProviderName.Data))) then
      begin
        AdjustLeadTimesForLMC(vo);
        CurrShipMinWk := vo.ShipMinWk.data;
        CurrShipMaxWk := vo.ShipMaxWk.data;
      end;

      if uOrderCarrierService.TOrderCarrierService.Instance.ManuallyCarrierChangesOnly(vo,
                                                                                       not NonStandardWarehouseUsed,
                                                                                       function(venddtlLine: TsqlVendDtlRecord): boolean
                                                                                        var
                                                                                          tmsContext: TTmsContext;
                                                                                       begin
                                                                                         tmsContext := TTmsContext.CreateNew(vo);
                                                                                         try
                                                                                           SystemSetVendDtlCarrierLine(tmsContext, venddtlLine, result);
                                                                                         finally
                                                                                           FreeAndNil(tmsContext);
                                                                                         end;
                                                                                       end
      ) then
      begin
        CurrCarrierType := vo.CarrierType.data;
      end;

      for j := 0 to vo.VendDtlList.Count - 1 do
      begin
        // After and Item is added, this function gets called and we may have a
        // combination of N, T or I on the Items.
        // After F4 Carrier selection, this functioon is also called,
        // but the Carrier For will set the CarrierType on all of the existing Items
        // to match the carrier type of the selected carrier.
        if (not (vo.VendDtlList[j].RecordState in [rsDelete, rsDeleted]))
          and (vo.VendDtlList[j].Status.data <> 'X')
          and (vo.VendDtlList[j].VendorCode.data = vo.VendorCode.data) then
        begin
          case vo.VendDtlList[j].carrierType.Data of
            'N': if CurrCarrierType = ' ' then
                CurrCarrierType := 'N';
            'T': if CurrCarrierType in [' ', 'N'] then
                CurrCarrierType := 'T';
            'I': if CurrCarrierType in [' ', 'N', 'T'] then
                CurrCarrierType := 'I';
          end;
          if vo.VendDtlList[j].ShipMaxWk.data > CurrShipMaxWk then
          begin
            CurrShipMinWk := vo.VendDtlList[j].ShipMinWk.data;
            CurrShipMaxWk := vo.VendDtlList[j].ShipMaxWk.data;
          end;
          if pos(vo.VendDtlList[j].ShipCode.Data, 'ISO') > pos(CurrShipCode, 'ISO') then
            CurrShipCode := vo.VendDtlList[j].ShipCode.Data;
        end;
      end;



      if (not vo.ManLeadTime.data) or (trim(vo.ShipCode.AsString) = '') then
      begin
        changed := changed or (vo.ShipCode.AsString <> currShipCode) or
          (vo.ShipMinWk.Data <> currShipMinWk) or
          (vo.ShipMaxWk.data <> currShipMaxWk);
        vo.ShipCode.AsString := CurrShipCode;
        vo.ShipMinWk.data := CurrShipMinWk;
        vo.ShipMaxWk.data := CurrShipMaxWk;
      end;


     HandleNonDefaultWarehouseMoves(changed, vo, CurrCarrierType, NonStandardWarehouseUsed);
     HandleDefaultCarrierChanges(changed, Result, Order, vo, ShipToState, ShipToZip, CurrCarrierType, NonStandardWarehouseUsed, j);
     DcDeliveryProgramService.TDCDeliveryProgramService.Instance.UpdateCarriersForDcDeliveryProgram(vo.OrderRecord, ((CurrCarrier <> vo.ActlCarrier.data) and
                                                                                                                      not (TDCDeliveryProgramService.Instance.CarrierManaullySet(vo))
                                                                                                                      )
                                                                                                                      );


     ExpectedArrivalDateService.TExpectedArrivalDateService.Instance.UpdateArrivalDateIfNeeded(vo);

     UpdateTmsCarrierSettings(vo, true);
     TOrderSystemLibrary.Instance.EnsureCurrentFeightValues(vo);

     if aVendorCode <> '' then
       break;
    end;


  end;

  // only display the carrier options changed if something really changed.
  changed := changed and (
               (vo.ShipCode.AsString <> currShipCode) or
               (vo.ShipMinWk.Data <> currShipMinWk)  or
               (vo.ShipMaxWk.data <> currShipMaxWk) or
               (vo.Carrier.Data <> CurrCarrier) or
               (vo.CarrierType.Data <> CurrCarrierType)
              ) ;

  if changed and showWarning then
  begin
    NBFDialogs.NBFMessageDlg(format('%s: Carrier options carrier has been changed, Please confirm delivery options.', [vo.VendorCode.Data]), mtWarning, [mbok], mrok, 0, false, 'Verify Carrier Options');
end;
  end;