[[AgustinOrtu]]

Evalua la propiedad RowCount antes de intentar moverte a la primera (imprimela en pantalla)

Yo uso este codigo y si puedo moverme a la primer fila:

Código Delphi [-]
  TForm4 = class(TForm)
    StringGrid1: TStringGrid;
    Panel1: TPanel;
    btnCargarGrid: TButton;
    btnFiltrarGrid: TButton;
    procedure btnCargarGridClick(Sender: TObject);
    procedure btnFiltrarGridClick(Sender: TObject);
  private
    procedure CargarGrid(Items: TStrings);
    procedure LimpiarGrid;
  end;

var
  Form4: TForm4;

implementation

{$R *.dfm}

procedure TForm4.btnCargarGridClick(Sender: TObject);
var
  Items: TStrings;
begin
  LimpiarGrid;
  Items := TStringList.Create;
  try
    Items.CommaText := 'Juan, Pedro, Marcos, Agustin, Daniel, German, Federico';
    CargarGrid(Items);
  finally
    Items.Free;
  end;
end;

procedure TForm4.btnFiltrarGridClick(Sender: TObject);
var
  Items: TStrings;
begin
  LimpiarGrid;
  Items := TStringList.Create;
  try
    // supongamos que se aplica la funcion "X" y devuelve estos nombres
    Items.CommaText := 'Juan, Pedro, Federico';
    CargarGrid(Items);

    // me paro en la primer fila, sin ningun problema
    StringGrid1.Row := 1;
  finally
    Items.Free;
  end;
end;

procedure TForm4.CargarGrid(Items: TStrings);
var
  I: Integer;
begin
  StringGrid1.RowCount := Items.Count + 1;
  for I := 0 to Items.Count - 1 do
  begin
    StringGrid1.Cells[0, I+1] := Items[i];
    StringGrid1.Cells[1, I+1] := Items[i];
    StringGrid1.Cells[2, I+1] := Items[i];
    StringGrid1.Cells[3, I+1] := Items[i];
  end;
end;

procedure TForm4.LimpiarGrid;
var
  I, J: Integer;
begin
  for I := 0 to StringGrid1.RowCount - 1 do
    for J := 0 to StringGrid1.ColCount - 1 do
      StringGrid1.Cells[I, J] := EmptyStr;
end;