Automatic ReaderInterface resolution stops before testing all interface

[toto975]

I try to get properties of presentation documents.

$phpOffice = IOFactory::load($fullPath)

It stops on the PowerPoint97 reader with this error :
The file is not in the format supported by class PhpOffice\PhpPresentation\Reader\PowerPoint97

It has to test every ReaderInterface defined in PhpPresentation\IOFactory.php
private static $autoResolveClasses = ['Serialized', 'ODPresentation', 'PowerPoint97', 'PowerPoint2007'];
before falling in error.

[Progi1984]

@toto975 Hi have you got a file with this error ?