Exception: A TrueType table tag must be a uint32, 4 bytes long, instead got: Ĉ(�. (Parameter 'tag')

[khanshahan]

Hi,

I am trying to read the file https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/40/17/TONIJ-5-206.PMC3257183.pdf but I am getting an exception "A TrueType table tag must be a uint32, 4 bytes long, instead got: Ĉ(�. (Parameter 'tag')".

The error is encountered when going through Pages.

I am using Nuget package 0.1.7-alpha-20220814-2f9a9
.NET 6.0

I am using the following code :
NOTE: pdfStream is a memory stream. Position=0 has already been set.
The same code works for the file "https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/db/77/ymj-47-432.PMC2688166.pdf"

        public string GetPDFText(Stream pdfStream)
        {
            StringBuilder stringBuilder = new StringBuilder();
            var pageCount = 0;
            
            using (PdfDocument document = PdfDocument.Open(pdfStream))
            {
                var pages = document.GetPages();
                foreach (Page page in pages)
                {
                    string pageText = page.Text;
                    stringBuilder.Append(" " + pageText);
                    pageCount++;
                }
            }
            return stringBuilder.ToString(); 
        }

[khanshahan]

HI,

Just wondering did you have a chance to look in this problem ?

[EliotJones]

This file was corrupt on page 3 according to Adobe Reader. The SkipMissingFonts option has been broadened in scope to account for broken files like this, it should be available in tonight's build. e.g.

using (var document = PdfDocument.Open(file, new ParsingOptions { SkipMissingFonts = true}))