Create doc and pdf return null

[goltra]

Hello, i´m testing demo and it build odf file but not doc and pdf file. I tried setting 100 lines with this code (this is only change i made):
for ($i=0; $i<100 ; $i++) {
$arrayData[]=['aa','bb','cc'];
}

$data = array(
'name' => 'Iván Guardado Castro',
'link' => 'ivanguardado.com',
'visits' => $arrayData
);

I make a var_dump to var_dump($docGenerator->create('result/final.doc', $data)); and return NULL (same in pdf test).