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[INC000006722819] Error cross references during docx to pdf conversion

Hello,

I contact you in order to help me to resolve an issue during combining several docx files in one pdf file. I have defined some cross referenced in my word INPUT4.docx. After transformation I noticed that ‘Error! Reference source not found.Error!’ is raised.

Could you investigate on it ?

I let the input in a zip file (input.zip) and the output with Word DLL 18.1 and 18.3.

result_word_dll_18.1.pdf (396.2 KB)
result_word_dll_18.3.pdf (396.5 KB)
input.zip (183.3 KB)

Please find below the code used :

First define in a class :
public Document DocxFile { get; set; }
public MemoryStream StreamOut { get; set; }
public MemoryStream StreamOutPdf { get; set; }

Then add combineFunction() below :

public void combineFunction()
{

try

{

//Get input data

List docs = new List(files);

Document doc1 = new Document(“INPUT1.docx”);

Document doc2 = new Document(“INPUT2.docx”);

Document doc3 = new Document(“INPUT3.docx”);

Document doc4 = new Document(“INPUT4.docx”);

Document doc5 = new Document(“INPUT5.docx”);

docs.Add(doc1);

docs.Add(doc2);

docs.Add(doc3);

docs.Add(doc4);

docs.Add(doc5);

Document dest = null;

Boolean firstDoc = true;

foreach (Document d in docs)

{

if (firstDoc)

{

dest = d;

//Margins

DocumentBuilder builder = new DocumentBuilder(dest);

PageSetup ps = builder.PageSetup;

ps.LeftMargin = ConvertUtil.MillimeterToPoint(25);

ps.RightMargin = ConvertUtil.MillimeterToPoint(25);

foreach (Section srcSection in dest)

{

srcSection.PageSetup.LeftMargin = ConvertUtil.MillimeterToPoint(25);

srcSection.PageSetup.RightMargin = ConvertUtil.MillimeterToPoint(25);

}

firstDoc = false;

}

else

{

foreach (Section srcSection in d)

{

Section newSection = (Section)dest.ImportNode(srcSection, true, ImportFormatMode.KeepDifferentStyles);

newSection.HeadersFooters.LinkToPrevious(true);

newSection.PageSetup.RestartPageNumbering = false;

newSection.PageSetup.PageNumberStyle = NumberStyle.Arabic;

newSection.PageSetup.LeftMargin = ConvertUtil.MillimeterToPoint(25);

newSection.PageSetup.RightMargin = ConvertUtil.MillimeterToPoint(25);

dest.Sections.Add(newSection);

}

}

}

RemoveSectionBreaks(dest);

//Save output

try

{

((Aspose.Words.Document)dest).Save(StreamOut, SaveFormat.Docx);

}

catch (Exception ex)

{

logger.Error(“Error on ASPOSE DOCX transformation.”, ex);

}

}

catch (Exception globalEx)

{

logger.Error(“Error in Docx merge method.”, globalEx);

}

ToPdf();
}


Below the function RemoveSectionBreaks(Document doc):

protected static void RemoveSectionBreaks(Document doc)
{

// Loop through all sections starting from the section that precedes the last one

// and moving to the first section.

Section mysection = doc.LastSection;

int nbSection = doc.Sections.Count-1;

for (int i = nbSection ; i >= 1; i–)

{

if(CompareFormatSection(doc,i))

{

// Copy the content of the current section to the beginning of the last section.

mysection.PrependContent(doc.Sections[i-1]);

// Remove the copied section.

doc.Sections[i-1].Remove();

}

else

{

mysection = doc.Sections[i-1];

}

}

}


Below the function ToPdf() :

private void ToPdf()
{

try

{

PdfSaveOptions options = new PdfSaveOptions();

options.ImageCompression = PdfImageCompression.Jpeg;

options.JpegQuality = 100;

options.FontEmbeddingMode = PdfFontEmbeddingMode.EmbedNone;

try

{

((Aspose.Words.Document)this.DocxFile).Save(this.StreamOutPdf, (Aspose.Words.Saving.PdfSaveOptions)options);

}

catch (Exception ex)

{

logger.Error(“Error on ASPOSE PDF transformation.”, ex);

throw ex;

}
}

catch (Exception globalEx)

{

logger.Error(“Error in HTML conversion method.”, globalEx);

throw globalEx;

}
}


Below the function CompareFormatSection(Document doc, int i) :

private static Boolean CompareFormatSection(Document doc, int i)
{
if (doc.Sections[i].PageSetup.Orientation.Equals(doc.Sections[i - 1].PageSetup.Orientation) &&
doc.Sections[i].PageSetup.PaperSize.Equals(doc.Sections[i - 1].PageSetup.PaperSize) &&
doc.Sections[i].PageSetup.LeftMargin.Equals(doc.Sections[i - 1].PageSetup.LeftMargin) &&
doc.Sections[i].PageSetup.RightMargin.Equals(doc.Sections[i - 1].PageSetup.RightMargin))
{

return true;
}
else return false;
}


Many thanks

Best regards

@CSCT,

Thanks for your inquiry. We have tested the scenario and have managed to reproduce the same issue at our side. For the sake of correction, we have logged this problem in our issue tracking system as WORDSNET-16588. You will be notified via this forum thread once this issue is resolved.

We apologize for your inconvenience.

@CSCT,

Thanks for your patience. The reason of this issue is that Aspose.Words renames bookmarks with duplicated names. So, when you copy content of section into the same document with RemoveSectionBreaks2(Document doc) method, the bookmarks are renamed and therefore corresponding field REF cannot be updated properly.

To fix the problem, please use following modified RemoveSectionBreaks2(Document doc) method. So, the section is first removed from the document and then its content is copied into another section.

protected static void RemoveSectionBreaks2(Document doc)
{
    // Loop through all sections starting from the section that precedes the last one
    // and moving to the first section.
    Section mysection = doc.LastSection;

    int nbSection = doc.Sections.Count - 1;
    for (int i = nbSection; i >= 1; i--)
    {
        if (CompareFormatSection(doc, i))
        {
            Section section = doc.Sections[i - 1];
            // Remove the section being copied.
            section.Remove();
            // Copy the content of the current section to the beginning of the last section.
            mysection.PrependContent(section);
        }
        else
        {
            mysection = doc.Sections[i - 1];
        }
    }
}