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Warning: simplexml_load_file(): I/O warning : failed to load external entity "" in C:\Apache24\htdocs\Fatt_Acq\read_xml.php on line 19

Fatal error: Uncaught Error: Call to a member function xpath() on boolean in C:\Apache24\htdocs\Fatt_Acq\read_xml.php:21 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\Fatt_Acq\read_xml.php on line 21