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Fatal error: Uncaught exception 'Exception' with message 'FPDF error: Some data has already been output, can't send PDF file' in D:\home\thermomat.net\httpdocs\pdfth\fpdf\fpdf.php:271 Stack trace: #0 D:\home\thermomat.net\httpdocs\pdfth\fpdf\fpdf.php(1063): FPDF->Error('Some data has a...') #1 D:\home\thermomat.net\httpdocs\pdfth\fpdf\fpdf.php(999): FPDF->_checkoutput() #2 D:\home\thermomat.net\httpdocs\pdfth\pdfthermomat.php(890): FPDF->Output() #3 {main} thrown in D:\home\thermomat.net\httpdocs\pdfth\fpdf\fpdf.php on line 271