Telerik Document Processing Feedback Portal

In Development

Last Updated: 18 Feb 2026 16:49 by ADMIN

PdfProcessing: High memory consumption when importing a document with many Path/Image elements

Created by: Mattia

Comments: 0

Category: PdfProcessing

Type: Bug Report

PdfProcessing: High memory consumption when importing a document with many Path/Image elements

When importing a document with many Path elements, the memory consumption could be very high.

Unplanned

Last Updated: 18 Feb 2026 15:46 by ADMIN

ADMIN

PdfProcessing: PdfStreamWriter: Apply encoding filter from StreamCompression setting when exporting XObject

Created by: Martin

Comments: 0

Category: PdfProcessing

Type: Feature Request

PdfProcessing: PdfStreamWriter: Apply encoding filter from StreamCompression setting when exporting XObject

With the current implementation, the compression setting is omitted:

streamWriter.Settings.StreamCompression

Duplicated

Last Updated: 17 Feb 2026 12:34 by ADMIN

PdfProcessing: Handle importing documents with corrupted href tableand wrong objects' offset

Created by: Eli

Comments: 0

Category: PdfProcessing

Type: Feature Request

PdfProcessing: Handle importing documents with corrupted href tableand wrong objects' offset

Such a document can be considered invalid. However, it would be good to provide functionality to handle it.

Update: After reviewing the case, we concluded that the issue is caused by the document being linearized. Therefore, this item is being marked as a duplicate. Please follow the related public item to receive notifications about future status updates.

In Development

Last Updated: 16 Feb 2026 09:11 by ADMIN

PdfViewer: System.ArgumentException: 'Operator not found'

Created by: Graham

Comments: 0

Category: PdfProcessing

Type: Bug Report

PdfViewer: System.ArgumentException: 'Operator not found'

As a result of the below missing operator, some of the glyphs can't be extracted from the CFFFontTable and the characters are not displayed in the PdfViewer:

The end user result is missing letter from the PDF content.

Completed

Last Updated: 13 Feb 2026 09:39 by ADMIN

Release 2026.1.210 (2026 Q1)

PdfProcessing: InvalidOperationException is thrown when parser incorrectly interprets delimiter characters within literal strings as structural tokens instead of string data

Created by: David

Comments: 0

Category: PdfProcessing

Type: Bug Report

PdfProcessing: InvalidOperationException is thrown when parser incorrectly interprets delimiter characters within literal strings as structural tokens instead of string data

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)

PdfProcessing: Failing to load an image prevents PDF Document to load properly

Created by: Manisai

Comments: 0

Category: PdfProcessing

Type: Bug Report

PdfProcessing: Failing to load an image prevents PDF Document to load properly

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)

PdfProcessing: Wrong transformation of glyph data

Created by: Desislava

Comments: 0

Category: PdfProcessing

Type: Bug Report

PdfProcessing: Wrong transformation of glyph data

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)

PdfProcessing: SkiaImageFormatProvider: Blacked out images due to incorrectly resolved clipping

Created by: Vitalii

Comments: 0

Category: PdfProcessing

Type: Bug Report

PdfProcessing: SkiaImageFormatProvider: Blacked out images due to incorrectly resolved clipping

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)

PdfProcessing: PdfStreamSigner: Introduce TimeStamp server support.

Created by: Janson

Comments: 0

Category: PdfProcessing

Type: Feature Request

PdfProcessing: PdfStreamSigner: Introduce TimeStamp server support.

Introduce support for TimeStampServer when using the PdfStreamSigner.

Completed

Last Updated: 13 Feb 2026 09:39 by ADMIN

Release 2026.1.210 (2026 Q1)

ADMIN

PdfProcessing: Incorrect annotation border array is rendered instead of being skipped

Created by: Martin

Comments: 0

Category: PdfProcessing

Type: Bug Report

PdfProcessing: Incorrect annotation border array is rendered instead of being skipped

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)

WordsProcessing: NullReferenceException when exporting a document with custom geometry

Created by: Rushik

Comments: 0

Category: WordsProcessing

Type: Bug Report

WordsProcessing: NullReferenceException when exporting a document with custom geometry

Exporting a document containing custom geometry throws a NullReferenceException, halting the export unexpectedly.

Completed

Last Updated: 13 Feb 2026 09:39 by ADMIN

Release 2026.1.210 (2026 Q1)

SpreadProcessing: LocalizableException is thrown after removing columns from a workbook with set Print Titles

Created by: Yannick Patton

Comments: 0

Category: SpreadProcessing

Type: Bug Report

SpreadProcessing: LocalizableException is thrown after removing columns from a workbook with set Print Titles

LocalizableException is thrown after removing columns from a workbook with set Print Titles.

Workaround - Remove the PrintTitles before removing the columns:

WorksheetPageSetup pageSetup = workbook.ActiveWorksheet.WorksheetPageSetup;
pageSetup.PrintTitles.RepeatedRows = null;
pageSetup.PrintTitles.RepeatedColumns = null;

Completed

Last Updated: 13 Feb 2026 09:39 by ADMIN

Release 2026.1.210 (2026 Q1)

PdfProcessing: CryptographicException is thrown when importing AES encrypted document with DocumentInfo

Created by: Jeff

Comments: 2

Category: PdfProcessing

Type: Bug Report

PdfProcessing: CryptographicException is thrown when importing AES encrypted document with DocumentInfo

CryptographicException is thrown when importing AES encrypted document with DocumentInfo.

Unplanned

Last Updated: 12 Feb 2026 10:45 by Rob

PdfProcessing: Add support for PDF Portfolios

Created by: Rob

Comments: 0

Category: PdfProcessing

Type: Feature Request

PdfProcessing: Add support for PDF Portfolios

Add support for PDF Portfolios.

Unplanned

Last Updated: 10 Feb 2026 11:37 by ADMIN

ADMIN

SpreadProcessing: Add support for inserting images in header/footer

Created by: Tanya

Comments: 5

Category: SpreadProcessing

Type: Feature Request

SpreadProcessing: Add support for inserting images in header/footer

Provide the ability to work with images in headers/footers of a worksheet. Note that large images put in headers are visualized as watermarks on printing/exporting to PDF.

Watermark in Excel: https://support.office.com/en-us/article/add-a-watermark-in-excel-a372182a-d733-484e-825c-18ddf3edf009

Unplanned

Last Updated: 10 Feb 2026 07:27 by Devron

PdfProcessing: .NET Standard: ArgumentOutOfRangeException: 'Index was out of range. Must be non-negative and less than the size of the collection. (Parameter 'index')' during import

Created by: Devron

Comments: 0

Category: PdfProcessing

Type: Bug Report

PdfProcessing: .NET Standard: ArgumentOutOfRangeException: 'Index was out of range. Must be non-negative and less than the size of the collection. (Parameter 'index')' during import

This exception was originally thrown at this call stack:
System.ThrowHelper.ThrowArgumentOutOfRange_IndexMustBeLessException()
System.Collections.Generic.List<T>.this[int].get(int)
Telerik.Windows.Documents.Core.PostScript.Data.PostScriptArray.GetElementAs<T>(int)
Telerik.Windows.Documents.Core.Fonts.Type1.Type1Format.Dictionaries.Type1PostScriptObject.GetGlyphName(ushort)
Telerik.Windows.Documents.Core.Fonts.Type1.Type1Format.Type1FontSource.GetGlyphName(ushort)
Telerik.Windows.Documents.Core.Fonts.Type1.Type1Format.Type1FontSource.GetAdvancedWidthOverride(int)
Telerik.Windows.Documents.Core.Fonts.FontSource.GetAdvancedWidth(int)
Telerik.Windows.Documents.Fixed.Model.Fonts.StandardFont.GetActualWidth(Telerik.Windows.Documents.Fixed.Model.Data.CharCode)
Telerik.Windows.Documents.Fixed.Model.Fonts.SimpleFont.GetWidthOverride(Telerik.Windows.Documents.Fixed.Model.Data.CharCode)
Telerik.Windows.Documents.Fixed.Model.Fonts.FontBase.GetWidth(Telerik.Windows.Documents.Fixed.Model.Data.CharCode)

Unplanned

Last Updated: 05 Feb 2026 14:48 by Bhaskar

PdfProcessing: ArgumentNullException: 'Value cannot be null. (Parameter 'source')' when importing a document which structure tree contains null or empty child elements

Created by: Bhaskar

Comments: 0

Category: PdfProcessing

Type: Bug Report

PdfProcessing: ArgumentNullException: 'Value cannot be null. (Parameter 'source')' when importing a document which structure tree contains null or empty child elements

Stacktrace:

   at System.Linq.ThrowHelper.ThrowArgumentNullException(ExceptionArgument argument)
   at System.Linq.Enumerable.Cast[TResult](IEnumerable source)
   at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Elements.MarkedContents.StructElementObject.CopyPropertiesTo(PostScriptReader reader, StructureElementsImportContext context, StructureElement element)
   at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Elements.MarkedContents.StructElementObject.CopyPropertiesTo(PostScriptReader reader, StructureElementsImportContext context, StructureElement element)
   at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Elements.MarkedContents.StructElementObject.CopyPropertiesTo(PostScriptReader reader, StructureElementsImportContext context, StructureElement element)
   at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Elements.MarkedContents.StructTreeChildrenObject.CopyPropertiesTo(PostScriptReader reader, StructureElementsImportContext context, StructureElementsCollection childElements)
   at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Elements.MarkedContents.StructTreeRootObject.CopyPropertiesTo(PostScriptReader reader, StructureElementsImportContext context)
   at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Elements.DocumentStructure.DocumentCatalog.CopyStructureTreeTo(PostScriptReader reader, IRadFixedDocumentImportContext context)
   at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Elements.DocumentStructure.DocumentCatalog.CopyPropertiesTo(PostScriptReader reader, IRadFixedDocumentImportContext context)
   at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Import.RadFixedDocumentImportContext.BeginImportOverride()
   at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Import.BaseImportContext.BeginImport(Stream pdfFileStream)
   at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Import.PdfImporter.Import(Stream input, IPdfImportContext context)
   at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.PdfFormatProvider.<>c__DisplayClass19_0.<ImportOverride>b__0()
   at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.ExceptionHandling.ExecutionHandler.TryHandleExecution[E](Action operation)
   at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.PdfFormatProvider.ImportOverride(Stream input, CancellationToken cancellationToken)
   at Telerik.Windows.Documents.Common.FormatProviders.FormatProviderBase`1.Import(Stream input, Nullable`1 timeout)

Unplanned

Last Updated: 03 Feb 2026 15:35 by ADMIN

ADMIN

SpreadProcessing: Implement an option to import numbers as text from CSV

Created by: Deyan

Comments: 6

Category: SpreadProcessing

Type: Feature Request

SpreadProcessing: Implement an option to import numbers as text from CSV

Currently, the numbers in a CSV file are parsed as numbers, and the leading zeros are lost. In MS Excel, leading zeros could be preserved when the values are imported as text using the more sophisticated text import wizard (http://www.upenn.edu/computing/da/bo/webi/qna/iv_csvLeadingZeros.html ).

Workaround: The values could be extracted using a third-party (or custom) CSV parser, and inserted manually into the model, using CellSelection.SetValueAsText method (http://docs.telerik.com/devtools/document-processing/libraries/radspreadprocessing/working-with-cells/cell-value-types.html ).

Unplanned