Incorrect Freepascal code generated for GetWMI_Info

[trayres]

//-----------------------------------------------------------------------------------------------------
//     This code was generated by the Wmi Delphi Code Creator (WDCC) Version 1.9.9.350
//     http://code.google.com/p/wmi-delphi-code-creator/
//     Blog http://theroadtodelphi.wordpress.com/wmi-delphi-code-creator/
//     Author Rodrigo Ruz V. (RRUZ) Copyright (C) 2011-2015 
//----------------------------------------------------------------------------------------------------- 
//
//     LIABILITY DISCLAIMER
//     THIS GENERATED CODE IS DISTRIBUTED "AS IS". NO WARRANTY OF ANY KIND IS EXPRESSED OR IMPLIED.
//     YOU USE IT AT YOUR OWN RISK. THE AUTHOR NOT WILL BE LIABLE FOR DATA LOSS,
//     DAMAGES AND LOSS OF PROFITS OR ANY OTHER KIND OF LOSS WHILE USING OR MISUSING THIS CODE.
//
//----------------------------------------------------------------------------------------------------
program GetWMI_Info;

{$mode objfpc} {$H+}

uses
  SysUtils,
  ActiveX,
  ComObj,
  Variants;
                

				
// Serial Port Name

procedure  GetMSSerial_PortNameInfo;
const
  WbemUser            ='';
  WbemPassword        ='';
  WbemComputer        ='localhost';
  wbemFlagForwardOnly = $00000020;
var
  FSWbemLocator : OLEVariant;
  FWMIService   : OLEVariant;
  FWbemObjectSet: OLEVariant;
  FWbemObject   : Variant;
  oEnum         : IEnumvariant;
  sValue        : string;   
begin;
  FSWbemLocator := CreateOleObject('WbemScripting.SWbemLocator');
  FWMIService   := FSWbemLocator.ConnectServer(WbemComputer, 'root\WMI', WbemUser, WbemPassword);
  FWbemObjectSet:= FWMIService.ExecQuery('SELECT * FROM MSSerial_PortName','WQL',wbemFlagForwardOnly);
  oEnum         := IUnknown(FWbemObjectSet._NewEnum) as IEnumVariant;
  while oEnum.Next(1, FWbemObject, nil) = 0 do
  begin
    sValue:= FWbemObject.Properties_.Item('Active').Value;
    Writeln(Format('Active          %s',[sValue]));// Boolean
    sValue:= FWbemObject.Properties_.Item('InstanceName').Value;
    Writeln(Format('InstanceName    %s',[sValue]));// String
    sValue:= FWbemObject.Properties_.Item('PortName').Value;
    Writeln(Format('PortName        %s',[sValue]));// String
	    
    Writeln('');
    FWbemObject:=Unassigned;
  end;
end;


begin
 try
    GetMSSerial_PortNameInfo;
 except
    on E:EOleException do
        Writeln(Format('EOleException %s %x', [E.Message,E.ErrorCode]));      
	on E:Exception do
        Writeln(E.Classname, ':', E.Message);
 end;
 Writeln('Press Enter to exit');
 Readln;    
end.

This line appears to be the problem:
while oEnum.Next(1, FWbemObject, nil) = 0 do