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The code fails at the line : iTextSharp.text.pdf.PRTokeniser. Why do I get an "InvalidPdfException: PDF header signature not found"? I am using the following Python code for iText evaluating purposes. import sys from com.itextpdf.text.pdf import PdfReader; After some research, I've found that this problem relates to either a file being corrupted during PDF generation, or an error related to an object in the On 9/23/2013 7:25 AM, Bapuji Nakka wrote: PDF header signature not found error there's no problem whatsoever if you use iText (Java) or iTextSharp (C#). After some research, I've found that this problem relates to either a file being corrupted during PDF generation, or an error related to an I am working on a computer (windows 7) belonging to a domain group. When I login as an administrator IOException: PDF header signature not found.