ArgumentException is thrown due to an element with an already existing parent while trying to split a table across pages.

Right alignment in a table does not work when converting from html to pdf

When importing HTML content to a RadFlowDocument and exporting it to PDF format, the following error message occurs:

System.ArgumentException: 'The document element is associated with another parent. (Parameter 'item')'

   at Telerik.Windows.Documents.Fixed.Model.Collections.DocumentElementCollection`2.VerifyDocumentElementOnInsert(T item)
   at Telerik.Windows.Documents.Core.Data.DocumentElementCollectionBase`2.Add(T item)
   at Telerik.Windows.Documents.Fixed.Model.Editing.FixedContentEditor.Append(PositionContentElement element)
   at Telerik.Windows.Documents.Fixed.Model.Editing.FixedContentEditor.Draw(PositionContentElement element)
   at Telerik.Windows.Documents.Fixed.Model.Editing.Layout.ContentElementLayoutElementBase`1.Draw(DrawLayoutElementContext context)
   at Telerik.Windows.Documents.Fixed.Model.Editing.Block.Draw(IEnumerable`1 lineElements, DrawLayoutElementContext context)
   at Telerik.Windows.Documents.Fixed.Model.Editing.Block.DrawInternal(FixedContentEditor editor, Rect boundingRect)
   at Telerik.Windows.Documents.Fixed.Model.Editing.Block.Draw(FixedContentEditor editor, Rect boundingRect)
   at Telerik.Windows.Documents.Fixed.Model.Editing.Tables.TableCell.Draw(FixedContentEditor editor)
   at Telerik.Windows.Documents.Fixed.Model.Editing.Tables.Table.DrawCellContent(FixedContentEditor editor, TableCell cell)
   at Telerik.Windows.Documents.Fixed.Model.Editing.Tables.Table.DrawTableCells(FixedContentEditor editor, Int32 rowIndex, TableCellCollection cells)
   at Telerik.Windows.Documents.Fixed.Model.Editing.Tables.Table.DrawTableRows(FixedContentEditor editor)
   at Telerik.Windows.Documents.Fixed.Model.Editing.Tables.Table.DrawInternal(FixedContentEditor editor, Rect boundingRect)
   at Telerik.Windows.Documents.Fixed.Model.Editing.Tables.Table.Draw(FixedContentEditor editor, Rect boundingRect)
   at Telerik.Windows.Documents.Fixed.Model.Editing.Tables.TableCell.Draw(FixedContentEditor editor)
   at Telerik.Windows.Documents.Fixed.Model.Editing.Tables.Table.DrawCellContent(FixedContentEditor editor, TableCell cell)
   at Telerik.Windows.Documents.Fixed.Model.Editing.Tables.Table.DrawTableCells(FixedContentEditor editor, Int32 rowIndex, TableCellCollection cells)
   at Telerik.Windows.Documents.Fixed.Model.Editing.Tables.Table.DrawTableRows(FixedContentEditor editor)
   at Telerik.Windows.Documents.Fixed.Model.Editing.Tables.Table.DrawInternal(FixedContentEditor editor, Rect boundingRect)
   at Telerik.Windows.Documents.Fixed.Model.Editing.Tables.Table.Telerik.Windows.Documents.Fixed.Model.Editing.Flow.IDrawArrangedElement.DrawArrangedElement(FixedContentEditor editor, Rect boundingRect)
   at Telerik.Windows.Documents.Fixed.Model.Editing.Flow.SectionInfo.DrawArrangedElement(IBlockElement blockElement, Double horizontalOffset, Double verticalOffset)
   at Telerik.Windows.Documents.Fixed.Model.Editing.Utils.SectionInfoExtensions.DrawArrangedElements(SectionInfo section, IList`1 elements)
   at Telerik.Windows.Documents.Fixed.Model.Editing.RadFixedDocumentEditor.Draw()
   at Telerik.Windows.Documents.Fixed.Model.Editing.RadFixedDocumentEditor.StartNewPage(SectionProperties sectionProperties)
   at Telerik.Windows.Documents.Fixed.Model.Editing.RadFixedDocumentEditor.StartNewPage()
   at Telerik.Windows.Documents.Fixed.Model.Editing.RadFixedDocumentEditor.AddBlock(IBlockElement blockElement, CancellationToken cancellationToken)
   at Telerik.Windows.Documents.Flow.FormatProviders.Pdf.Export.PdfExporter.ExportSection(Section section, RadFixedDocumentEditor editor)
   at Telerik.Windows.Documents.Flow.FormatProviders.Pdf.Export.PdfExporter.ExportDocument(RadFlowDocument document, RadFixedDocumentEditor editor)
   at Telerik.Windows.Documents.Flow.FormatProviders.Pdf.Export.PdfExporter.ExportInternal()
   at Telerik.Windows.Documents.Flow.FormatProviders.Pdf.Export.PdfExporter.Export()
   at Telerik.Windows.Documents.Flow.FormatProviders.Pdf.PdfFormatProvider.ExportToFixedDocument(RadFlowDocument document, CancellationToken cancellationToken)
   at Telerik.Windows.Documents.Flow.FormatProviders.Pdf.PdfFormatProvider.ExportOverride(RadFlowDocument document, Stream output, CancellationToken cancellationToken)
   at Telerik.Windows.Documents.Common.FormatProviders.FormatProviderBase`1.Export(T document, Stream output, Nullable`1 timeout)
   at _1713205HtmlToPdf.Program.Main(String[] args) in C:\Users\dyordano\OneDrive - Progress Software Corporation\MyProjects\1713205HtmlToPdf\Program.cs:line 46

This missing functionality may be workaround by implementing and registering custom IPdfFilter implementation that decodes JPEG2000 images. The custom decoder may be registered with FiltersManager class and its implementation may be similar to RadPdfViewers JpxDecoder SDK example implementation:

- https://github.com/telerik/xaml-sdk/blob/master/PdfViewer/CustomDecoder/JpxDecoder.cs
- Use a custom JPXDecode filter with RadPdfViewer

Support for validating signature fields signed with signatures that are encoded in ETSI.CAdES.detached encoding should be added.

InvalidCastException is thrown when importing a PDF with a CR-terminated comment in its /Info dictionary.

RTF import loses the font applied once at paragraph/body level and falls back to a default font instead, when the  \fonttbl  uses flat, non-grouped font entries rather than individually braced  {\fN ...}  fonts.

Workaround: Re-save the document in MS Word.

 

PDF export places fixed-position images on the wrong page.

Missing table row content due to incorrect measurements after PDF export of a specific document.

PdfFormatProvider: Paragraph-style tab stops are not fully ignored during export, causing unexpected tab positions.

PDF export fails after HTML blocks containing empty or named anchors are imported and inserted into a RadFlowDocument through ReplaceText.

HTML importer creates hyperlink field markers for <a name="...">. During block replacement, cloned FieldCharacter instances lose FieldInfo, leaving orphan field markers. PDF exporter later dereferences FieldInfo and throws a NullReferenceException.

Internally, the WebClient class is used to load external resources. This class is not supported in Blazor and WordsProcessing should provide a mechanism for loading the resource.

Hello

Calling MailMerge on a document with a nested repeating group throws NullReferenceException when a merged value contains a line terminator.

All of the following are required to reproduce the crash:

• The group («BeginGroup:Items» … «EndGroup:Items») is nested inside an outer group
• The field whose value contains the newline sits in a later table cell than the group's begin marker
• The value belongs to a non-last record

I have attached a minimal repro demonstrating the bug.

Empty paragraphs are exported to PDF with a bigger font size.

When a paragraph has defined tab stops in its style and has the same tab stops locally cleared, the tab stops are still respected when exporting to PDF. Instead, cleared tab stops should not be respected.

Removing/adding rows/columns inside a worksheet requires all the data after them to be translated according to the change. This operation is slow and affects editing performance.

InvalidDataException is thrown when importing an XLS document with malformed compressed picture data in the drawing layer.

Center alignment is not respected for list numbering.

Expected:

Actual:

The values of rotated widgets on a rotated page are invisible after exporting them. The value can be seen only while editing a field.

Wrapped table cell text is incorrectly split by hyphens ("-").

This is a regression introduced in version 2026.3.826. Use an older version to avoid this issue.