multiples fallos en symfony al mostrar pagina

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otro error


[1/2] ParseException: A YAML file cannot contain tabs as indentation in E:\\wamp\\www\\Symfony\\src\\MDW\\DemoBundle\/Resources\/config\/routing.yml at line 4 (near " "). -+

in E:\wamp\www\Symfony\vendor\symfony\src\Symfony\Com ponent\Yaml\Parser.php at line 70 -+
// tab?
if ("\t" === $this->currentLine[0]) {
throw new ParseException('A YAML file cannot contain tabs as indentation.', $this->getRealCurrentLineNb() + 1, $this->currentLine);
}
$isRef = $isInPlace = $isProcessed = false;