Datei kopieren und umbenennen

[strom]

hallo,

bekomme hier eine Fehlermeldung! Siehe Anhang!
Was muss geändert werden?

Delphi-Quellcode:

unit Unit1;

interface

uses
  Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
  Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Filectrl, Vcl.ExtCtrls,
  Vcl.ComCtrls;

type
  TForm1 = class(TForm)
    Panel1: TPanel;
    Edit1: TEdit;
    Label1: TLabel;
    Button2: TButton;
    Panel2: TPanel;
    Edit2: TEdit;
    Label2: TLabel;
    Panel3: TPanel;
    Button3: TButton;
    Button4: TButton;
    procedure Button2Click(Sender: TObject);
    procedure FormCreate(Sender: TObject);
    procedure Button3Click(Sender: TObject);
    procedure Button4Click(Sender: TObject);
  private
    { Private-Deklarationen }
  public
    { Public-Deklarationen }
  end;

var
  Form1: TForm1;
   zaehler: integer =1;

implementation

{$R *.dfm}

procedure TForm1.Button2Click(Sender: TObject);
var
  Dir: String;
begin
  SelectDirectory('Verzeichnispfad wählen', '', Dir);
  ShowMessage(Dir);
  Edit1.Text := (Dir);
end;

procedure TForm1.Button3Click(Sender: TObject);
var
  Dir: String;
begin
  SelectDirectory('Verzeichnispfad wählen', '', Dir);
  ShowMessage(Dir);
  Edit2.Text := (Dir);
end;

procedure TForm1.Button4Click(Sender: TObject);
var
  mem : TMemoryStream;
  FilePathA, FilePathB : string;
  i:integer;
begin
  inc(zaehler);
  FilePathA := Edit1.Text + (ParamStr(i))+  '*.asc';; // Pfad der zu kopierenden Datei
  FilePathB := Edit2.Text + (ParamStr(i)) +(FormatDateTime('yymmdd',now))+(Format('%.4d',[zaehler]) + '.asc'); // Zielpfad
  mem := TMemoryStream.Create;
  try
    mem.LoadFromFile(filePathA);
    mem.SaveToFile(FilepathB);
  finally
    mem.Free;
  end;
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
 Edit1.Clear;
 Edit2.Clear;
end;

end.