PDF file corrupted when decrypted

Hi,



We are working with Aspose.Pdf v7.7.0.0 and we have some issues to decrypt a pdf file (see attachment).



I try the following code and it worked well with some PDF :

try

{

   PdfFileInfo fileInfo = new PdfFileInfo(documentToConvert);

   Aspose.Pdf.Document doc = new Aspose.Pdf.Document(documentToConvert);



   // determine that source PDF file is Encrypted with password

if (fileInfo.IsEncrypted)

   {

      doc.Decrypt();

   }

   doc.Save("C:/Temp/newdoc.pdf");

}

catch (Exception)

{

}



But for some reasons, it don't work with some other PDF.

I got the following message when I try to open the file : "There was an error opening this document. There was a problem reading this document (109).



Someone as any hint for me ?



Thanks in advance