In Development
Last Updated: 02 Oct 2025 12:58 by ADMIN
Part of the stack trace: 
System.OutOfMemoryException: Insufficient memory to continue the execution of the program.
   at System.Text.StringBuilder.ExpandByABlock(Int32 minBlockCharCount)
   at System.Text.StringBuilder.AppendWithExpansion(Char value)
   at System.Text.StringBuilder.Append(Char value)
   at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Utilities.CrossReferenceCollectionReader.GetAllText(Reader reader, Int64 minOffset, Int64 maxOffset)
   at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Utilities.CrossReferenceCollectionReader.FindAllObjectOffsets(Reader reader, Dictionary`2 tokenToOffsets, Int64 minOffset, Int64 maxOffset)
In Development
Last Updated: 02 Oct 2025 09:15 by ADMIN

 Tables should ignore fixed proffered width with the value of 0, this is the default behavior in Word as well.

Workaround (when converting Flow to PDF documents): 

foreach (var item in tables)
{
    if (item.PreferredWidth.Type == Telerik.Windows.Documents.Flow.Model.Styles.TableWidthUnitType.Fixed && 
        item.PreferredWidth.Value == 0)
    {
        item.PreferredWidth = new Telerik.Windows.Documents.Flow.Model.Styles.TableWidthUnit(Telerik.Windows.Documents.Flow.Model.Styles.TableWidthUnitType.Percent, 100);
    } 
  
    
}

In Development
Last Updated: 02 Oct 2025 08:11 by ADMIN
Stacktrace: 
   at System.ThrowHelper.ThrowArgumentNullException(ExceptionArgument argument)
   at System.Collections.Generic.Dictionary`2.FindValue(TKey key)
   at System.Collections.Generic.Dictionary`2.ContainsKey(TKey key)
   at Telerik.Windows.Documents.Spreadsheet.FormatProviders.OpenXml.Xlsx.Model.Elements.Worksheets.ConditionalFormattingRuleElementX14.OnAfterRead(IXlsxWorksheetImportContext context) in C:\Work\document-processing\Documents\Spreadsheet\FormatProviders\OpenXml\Xlsx\Model\Elements\Worksheets\ConditionalFormatting\x14\ConditionalFormattingRuleElementX14.cs:line 62
Completed
Last Updated: 02 Oct 2025 05:28 by ADMIN
Release 2025 Q3
ADMIN
Created by: Anna
Comments: 1
Category: PdfProcessing
Type: Feature Request
5
The hierarchical document structure is a means to describe the PDF document structure, which is currently not supported. See 10.6.1 Structure Hierarchy on 856 page of the PDF specification for details.
This document structure is an alternative to the standard PDF structure and most non-Adobe software does not support it.

The document might have been created with Adobe software like Adobe LiveCycle Designer. Very often the document contains some fallback text in the standard PDF structure like:
"Please wait... If this message is not eventually replaced by the proper contents of the document, your PDF viewer may not be able to display this type of document."
"The document you are trying to load requires Adobe Reader 8 or higher. You may not have the Adobe Reader installed or your viewing environment may not be properly configured to use Adobe Reader. For information on how to install Adobe Reader and configure your viewing environment please see  http://www.adobe.com/go/pdf_forms_configure."
"For the best experience, open this PDF portfolio in Acrobat X, Reader X, or later."
Unplanned
Last Updated: 01 Oct 2025 13:07 by Babu

When imported in the WordsProcessing model, the current HTML doesn't respect the defined column width and all columns have identical width:

    <colgroup>
        <col span="1" style="width: 33.3302%;">
        <col span="1" style="width: 17.5658%;">
        <col span="1" style="width: 49.104%;">
    </colgroup>

Observed result:

Expected result:

Workaround: use the width property as follows:

    <colgroup>
        <col span="1" width="33.3302%">
        <col span="1" width="17.5658%">
        <col span="1" width="49.104%">
    </colgroup>
Unplanned
Last Updated: 01 Oct 2025 10:42 by David

Corrupted document when exporting "Courier New" subset.

Workaround - fully embed the font:

var pdfFormatProvider = new PdfFormatProvider();
pdfFormatProvider.ExportSettings.FontEmbeddingType = FontEmbeddingType.Full;

 

In Development
Last Updated: 01 Oct 2025 05:37 by ADMIN
Appending content to an existing workbook results in a corrupted document.
In Development
Last Updated: 29 Sep 2025 14:27 by ADMIN

Read the documentation for CancelationTokenSource.CancelAfter:

this method will throw an ArgumentOutOfRangeException when: delay.TotalMilliseconds is less than -1 or greater than Int32.MaxValue (or UInt32.MaxValue - 1 on some versions of .NET). Note that this upper bound is more restrictive than TimeSpan.MaxValue.

----------------------------------------------------

your code in CancelationTokenSourceFactory.CreateTokenSource does this check:

if (timeSpan.HasValue && timeSpan.Value != TimeSpan.MaxValue)

this check for TimeSpan.MaxValue seems totally pointless here, if timeSpan is anything between ~2147483647 and 922337203685476 milliseconds long this will still just throw a ArgumentOutOfRangeException.

I suspect that this check was intended as a way to prevent creating a cancellation timer that never triggers in the CancellationTokenSource, which should look like this:

if (timeSpan.HasValue && timeSpan != Timeout.InfiniteTimeSpan) //Timeout.InfiniteTimeSpan is -1 milliseconds
which still seems like premature optimization with no noticeable benefit but at least it isn't completely pointless.
Completed
Last Updated: 29 Sep 2025 14:22 by ADMIN
Release 2025.2.520 (2025 Q2)
This is a sample code to replicate the error which is triggered on export: 
            string inputFileName = "input.xlsx";
            if (!File.Exists(inputFileName))
            {
                throw new FileNotFoundException(String.Format("File {0} was not found!", inputFileName));
            }

            Telerik.Windows.Documents.Spreadsheet.Model.Workbook workbook;
            IWorkbookFormatProvider formatProvider = new Telerik.Windows.Documents.Spreadsheet.FormatProviders.OpenXml.Xlsx.XlsxFormatProvider();

            using (Stream input = new FileStream(inputFileName, FileMode.Open))
            { 
                workbook = formatProvider.Import(input, TimeSpan.MaxValue);
            }
            string outputFilePath = "output.xlsx";

            using (Stream output = new FileStream(outputFilePath, FileMode.Create))
            {
                formatProvider.Export(workbook, output, TimeSpan.MaxValue);
            }
            Process.Start(new ProcessStartInfo() { FileName = outputFilePath, UseShellExecute = true });
Unplanned
Last Updated: 26 Sep 2025 09:01 by Monali
Created by: Monali
Comments: 0
Category: WordsProcessing
Type: Feature Request
0
Add support for Ink annotations (InkML).
Unplanned
Last Updated: 25 Sep 2025 13:36 by ADMIN
Created by: Byron George
Comments: 2
Category: Telerik Document Processing
Type: Feature Request
2
Add support for encrypting documents with an AES-128 algorithm.
Unplanned
Last Updated: 25 Sep 2025 09:01 by Paul
Tab stop distances are not calculated correctly during PDF export if a hanging indent is applied.
Unplanned
Last Updated: 23 Sep 2025 11:05 by Sandy
Setting transparency to a chart series color results in a corrupted document.
Unplanned
Last Updated: 22 Sep 2025 07:45 by Dmitri
In Development
Last Updated: 19 Sep 2025 12:15 by ADMIN

InvalidCastException is thrown when importing a document with a structure element with an indirect reference to an integer value.

InvalidCastException: 'Unable to cast object of type 'Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Types.PdfInt' to type 'Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Elements.MarkedContents.StructElementObject'.'

In Development
Last Updated: 18 Sep 2025 13:12 by ADMIN
ArgumentNullException is thrown when importing a restricted, AES-encrypted document.
Unplanned
Last Updated: 18 Sep 2025 12:49 by Christopher
KeyNotFoundException is thrown when importing a document with a structure element that references a page that is not part of the page collection.
Unplanned
Last Updated: 15 Sep 2025 13:28 by Tibor
The "w:multiLine" property of a text content control is lost on import-export.
<w:sdt>
  <w:sdtPr>
    <w:text w:multiLine="1"/>
  </w:sdtPr>
  <w:sdtContent>
    <w:r>
      <w:t>Line 1</w:t>
    </w:r>
    <w:r>
      <w:br/>
    </w:r>
    <w:r>
      <w:t>Line 2</w:t>
    </w:r>
  </w:sdtContent>
</w:sdt>
Unplanned
Last Updated: 15 Sep 2025 13:07 by Tibor
Disappearing borders due to "w:val" property changing from "none" to "nil" on import-export.
Unplanned
Last Updated: 15 Sep 2025 11:30 by Steinar
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