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Notice: Undefined index: example_012.pdf in C:\www\php\bk\xmllov-jmartin\lib\tcpdf\tcpdf.php on line 12429

Notice: Trying to access array offset on value of type null in C:\www\php\bk\xmllov-jmartin\lib\tcpdf\tcpdf.php on line 12429
TCPDF ERROR: Some data has already been output, can't send PDF file