Completed
Last Updated: 13 Feb 2026 09:39 by ADMIN
Release 2026.1.210 (2026 Q1)
InvalidOperationException is thrown when the parser incorrectly interprets delimiter characters within literal strings as structural tokens instead of string data.
Completed
Last Updated: 13 Feb 2026 09:39 by ADMIN
Release 2026.1.210 (2026 Q1)
If the document contains an image that fails to be imported properly, an internal error occurs and the import process is interrupted leading to incomplete document with missing elements. 
Completed
Last Updated: 13 Feb 2026 09:39 by ADMIN
Release 2026.1.210 (2026 Q1)
Created by: Desislava
Comments: 0
Category: PdfProcessing
Type: Bug Report
0
It seems there is an issue when transforming the position of the original glyph data
Completed
Last Updated: 13 Feb 2026 09:39 by ADMIN
Release 2026.1.210 (2026 Q1)
SkiaImageFormatProvider: Blacked out images due to incorrectly resolved clipping.
Completed
Last Updated: 13 Feb 2026 09:39 by ADMIN
Release 2026.1.210 (2026 Q1)
Introduce support for TimeStampServer when using the PdfStreamSigner.
Completed
Last Updated: 13 Feb 2026 09:39 by ADMIN
Release 2026.1.210 (2026 Q1)

The unexpected border array:

14 0 obj
<< /A 16 0 R /Border [ 10 10 10 60 ] /Rect [ 411 36 565 48 ] /Subtype /Link /Type /Annot >>
endobj
According to the PDF Specification:

"In PDF 1.0, the array consists of three numbers defining the horizontal corner radius, vertical corner radius, and border width, all in default user space units. If the corner radii are 0, the border has square (not rounded) corners; if the border width is 0, no border is drawn. (See implementation note 81 in Appendix H.)

In PDF 1.1, the array may have a fourth element, an optional dash arraydefining a pattern of dashes and gaps to be used in drawing the border."

Completed
Last Updated: 13 Feb 2026 09:39 by ADMIN
Release 2026.1.210 (2026 Q1)
CryptographicException is thrown when importing AES encrypted document with DocumentInfo.
Completed
Last Updated: 26 Jan 2026 14:45 by ADMIN
Release 2024.4.1106 Q4 2024
When a Form with AlphaConstant and/or StrokeConstant contains a Path, alpha is applied to Form and Path, leading to a wrong transparency.
Completed
Last Updated: 26 Jan 2026 14:39 by ADMIN
Release 2024.4.1106 Q4 2024
StackOverflowException is thrown when applying filter for SVG.
Completed
Last Updated: 26 Jan 2026 14:38 by ADMIN
Release 2025.1.205 (2025 Q1)

This is the code snippet for reproducing the error message: 

        static void Main(string[] args)
        {
            string filePath = "Lorem ipsum dolor sit amet.pdf";
            //load a random document
            PdfFormatProvider provider = new PdfFormatProvider();
            RadFixedDocument originalDocument;
            using (Stream stream = File.OpenRead(filePath))
            {
                originalDocument = provider.Import(stream);
            }
            //draw something on the first page
            FixedContentEditor editor = new FixedContentEditor(originalDocument.Pages[0]);
            editor.GraphicProperties.IsFilled = true;
            editor.GraphicProperties.FillColor = RgbColors.Black;
            Telerik.Documents.Primitives.Rect Rect = new Telerik.Documents.Primitives.Rect(10, 10, 200, 100);
            editor.DrawRectangle(Rect);

            //export the pages as images and build a brand new document from the images
            SkiaImageFormatProvider imageProvider = new SkiaImageFormatProvider();
            imageProvider.ExportSettings.ImageFormat = SkiaImageFormat.Jpeg;
            imageProvider.ExportSettings.ScaleFactor = 0.8;
            imageProvider.ExportSettings.Quality = 80;


            RadFixedDocument doc = new RadFixedDocument();
            foreach (RadFixedPage page in originalDocument.Pages)
            {
                byte[] resultImage = imageProvider.Export(page);
                RadFixedPage pdfpage = doc.Pages.AddPage();
                editor = new FixedContentEditor(pdfpage);
                Stream imageStream = new MemoryStream(resultImage);
                editor.DrawImage(imageStream);
            }

            //export the pdf built from the images
            PdfFormatProvider pdfFormatProvider = new PdfFormatProvider();
            string outputPdf = @"output.pdf";
            File.Delete(outputPdf);
            using (Stream output = File.OpenWrite(outputPdf))
            {
                pdfFormatProvider.Export(doc, output);
            }
            Process.Start(new ProcessStartInfo() { FileName = outputPdf, UseShellExecute = true });
        }

Workaround:

        static void Main(string[] args)
        {
            string filePath = "Lorem ipsum dolor sit amet.pdf";
            //load a random document
            PdfFormatProvider provider = new PdfFormatProvider();
            RadFixedDocument originalDocument;
            using (Stream stream = File.OpenRead(filePath))
            {
                originalDocument = provider.Import(stream);
            }
            //draw something on the first page
            FixedContentEditor editor = new FixedContentEditor(originalDocument.Pages[0]);
            editor.GraphicProperties.IsFilled = true;
            editor.GraphicProperties.FillColor = RgbColors.Black;
            Telerik.Documents.Primitives.Rect Rect = new Telerik.Documents.Primitives.Rect(10, 10, 200, 100);
            editor.DrawRectangle(Rect);

            using (Stream output = File.OpenWrite(filePath))
            {
                provider.Export(originalDocument, output);
            }

            using (Stream stream = File.OpenRead(filePath))
            {
                originalDocument = provider.Import(stream);
            }
            //export the pages as images and build a brand new document from the images
            SkiaImageFormatProvider imageProvider = new SkiaImageFormatProvider();
            imageProvider.ExportSettings.ImageFormat = SkiaImageFormat.Jpeg;
            imageProvider.ExportSettings.ScaleFactor = 0.8;
            imageProvider.ExportSettings.Quality = 80;


            RadFixedDocument doc = new RadFixedDocument();
            foreach (RadFixedPage page in originalDocument.Pages)
            {
                byte[] resultImage = imageProvider.Export(page);
                RadFixedPage pdfpage = doc.Pages.AddPage();
                editor = new FixedContentEditor(pdfpage);
                Stream imageStream = new MemoryStream(resultImage);
                editor.DrawImage(imageStream);
            }

            //export the pdf built from the images
            PdfFormatProvider pdfFormatProvider = new PdfFormatProvider();
            string outputPdf = @"output.pdf";
            File.Delete(outputPdf);
            using (Stream output = File.OpenWrite(outputPdf))
            {
                pdfFormatProvider.Export(doc, output);
            }
            Process.Start(new ProcessStartInfo() { FileName = outputPdf, UseShellExecute = true });
        }

Completed
Last Updated: 26 Jan 2026 14:33 by ADMIN
Release 2025.3.1007
Manually set form field values are not preserved when opened in Adobe Acrobat.
Completed
Last Updated: 26 Jan 2026 14:32 by ADMIN
Release 2025.2.520 (2025 Q2)

Error message: 

System.InvalidCastException: 'Unable to cast object of type 'Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Elements.Forms.FormFieldsTree' to type 'Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Types.PdfArray'.'
Completed
Last Updated: 26 Jan 2026 14:32 by ADMIN
Release 2025.2.520 (2025 Q2)
Missing spaces from TextFragments when exporting to plain text.
Completed
Last Updated: 26 Jan 2026 14:32 by ADMIN
Release 2025.2.520 (2025 Q2)
InvalidCastException is thrown due to incorrectly parsed stream dictionary.
Completed
Last Updated: 26 Jan 2026 14:32 by ADMIN
Release 2025.2.520 (2025 Q2)
Completed
Last Updated: 26 Jan 2026 14:32 by ADMIN
Release 2025.2.520 (2025 Q2)
Specific TextFragments that are positioned a little further from the previous text are incorrectly recognized as word start by the text recognizer engine and result in additional white spaces in the exported text.  
Completed
Last Updated: 26 Jan 2026 14:32 by ADMIN
Release 2025.2.520 (2025 Q2)
AcroForms are not saved when splitting a document into pages. This leads to forms not being recognized when the file is imported back.
Completed
Last Updated: 26 Jan 2026 14:27 by ADMIN
Release 2025.4.1216 (2025 Q4)

During export operation of a document that contains signature fields the following error occurs: 

System.InvalidOperationException: 'The signature was not properly initialized for external signing. The signing delegate is missing.'
Completed
Last Updated: 26 Jan 2026 14:27 by ADMIN
Release 2025.4.1216 (2025 Q4)

When importing a large document (e.g. 2.3GB) , the library fails to parse int value that exceeds the limit which leads to endless importing:

Completed
Last Updated: 26 Jan 2026 14:27 by ADMIN
Release 2025.4.1216 (2025 Q4)

Resaving a document with Acrobat throws an error due to invalid Info dictionary in document trailer.

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