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xpehybcem · Joined: 28 Mar 2008 Posts: 2

Hi,

I think I found a bug. I cannot open PDF files generated by PDF-XChange.
I get this assertion:

Unhandled Exception: PdfSharp.Pdf.IO.PdfReaderException: Cannot handle iref streams. The current implementation of PDFsharp cannot handle this PDF feature introduced with Acrobat 6.

at PdfSharp.Pdf.IO.Parser.ReadXRefTableAndTrailer(PdfReferenceTable xrefTable) in Parser.cs:line 741
at PdfSharp.Pdf.IO.Parser.ReadTrailer() in Parser.cs:line 718
at PdfSharp.Pdf.IO.PdfReader.Open(Stream stream, String password, PdfDocumentOpenMode openmode, PdfPasswordProvider passwordProvider) in PdfReader.cs:line 275
at PdfSharp.Pdf.IO.PdfReader.Open(String path, String password, PdfDocumentOpenMode openmode, PdfPasswordProvider provider) in PdfReader.cs:line 200
at PdfSharp.Pdf.IO.PdfReader.Open(String path) in PdfReader.cs:line 216 at ProtectDocument.Program.Main(String[] args)

I can open these files in Acrobat 8 without any problems. To make it work, I converted the PDF files to the PostScript format and then used the Acrobat Distiller to create the pdf files and it works, but it takes many steps. It would be nice to work with those files using PdfSharp directly.

How can I fix this?

Thanks in advance.

Thomas Hoevel · Joined: 16 Oct 2006 Posts: 387 Location: Cologne, Germany

Hello!

We can only fix it if we can replicate it.
Therefore we need a PDF file that causes this error (I'll send you an email address via PM).
_________________
Regards
Thomas Hoevel
PDFsharp Team

Thomas Hoevel · Joined: 16 Oct 2006 Posts: 387 Location: Cologne, Germany

Hello!

xpehybcem · Joined: 28 Mar 2008 Posts: 2

Thomas,

You have been very helpful. I generated the files using the Acrobat 5 compatibility option and was able to modify files directly using PDFSharp.

Thanks again!!!.

DavesNotHere · Joined: 02 Apr 2009 Posts: 2

I am having the same issue, oddly almost exactly a year after xpehybcem. Has this been resolved be the newest version (1.20 I think). I have an older version and didn't know if simply upgrading would solve my problem. Thanks.

Thomas Hoevel · Joined: 16 Oct 2006 Posts: 387 Location: Cologne, Germany

AFAIK this is not yet fixed with version 1.20.
_________________
Regards
Thomas Hoevel
PDFsharp Team

DavesNotHere · Joined: 02 Apr 2009 Posts: 2

Not a huge problem. I did find a work around in this case, the Reduce File Size option worked for me.

Thanks for keeping an eye on it.

nwebster · Joined: 04 May 2009 Posts: 13

What is really odd about this is that when I run this on my local machine, it works fine. But when I move it to our production server, it doesn't work. Has anyone come across this situation?

Edit: I was able to edit the pdf file in a hex editor and change the version from 1.5 to 1.4 and then pdfsharp handled it fine on all machines.