NullReferenceException is thrown when importing a file with explicitly set UserInterfaceName annotation property to null.

After merging documents with PdfStreamWriter the JavaScript actions are broken and not working.

When importing a document with a missing state separator (e.g. linefeed) in the object stream (ObjStm) an exception is thrown: System.InvalidCastException: 'Unable to cast object of type 'Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Types.PdfDictionary' to type 'Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Types.PdfInt'.'

А possible workaround could be handling the exceptions: Handling Exceptions.

Exporting a PDF documents with 2 pages (that are big images) is slow as hell & consuming way too much memory. (for a 2MiB file, over 2GiB!!!)

When exporting the pdf pages as images with the Skia engine, some parts of the document got missing.

Note: In the previous Version 2024.3.806 these parts appeared.

OverflowException (Arithmetic operation resulted in an overflow.) when converting a document to an image. 

Signature omitted after exporting PDF to an image.   

It seems the font that is rendered in Adobe is not the same. The document does not contain the font and Adobe and PdfViewer are fallbacking to different fonts.

RadPdfProcessing currently supports interactive forms whose data is defined directly in the document. Add support for interactive forms based on the Adobe XML Forms Architecture (XFA). The entry is defined inside the interactive forms dictionary and refers to an XML stream containing the information of the form. More information is available on page 722 from Pdf Reference, version 1.7.
Updates:
November 2024
From PDF 2.0 (ISO 32000-2) the XFA forms are depreciated. For this reason, we are changing our plans and declining this item, but we will provide import-export support to avoid losing existing XFA content. Please, subscribe to the following public item: PdfProcessing: Add support for XFA fields import-export.

Add support for actions with invalid Subtype casing.

Example: The action Subtype being "Javascript" instead of the expected "JavaScript".

Add support for Arrange Options (level placement):

• Bring to Front
• Send to Back
• Bring Forward
• Send Backward

InvalidCastException: 'Unable to cast object of type 'Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Types.PdfArray' to type 'Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Types.PdfName'.'
when parsing a specific document.

Allow customers to encrypt their documents using certificates.

Expose a DocumentUnhandledException PdfExportSetting when converting a RadFlowFlow to a RadFixedDocument document.

When writing a RadFixedPage with image content using the PdfPageStreamWriter`s WriteContent method an exception is thrown: NullReferenceException: 'Object reference not set to an instance of an object.'

Usually, the object references are expected to be stored in the following format: "5 0 obj". However, if the format is "0000005 0 obj", the document can't be parsed successfully. As a result the document is not displayed in RadPdfViewer.

Matte color is used for preblending images with some background color, using the SMask. Matte color is specified using the optional 'Matte' entry for the SMask object.

See PDF 1.7 specification, page 554-555:

Matte
array
(Optional; PDF 1.4) An array of component values specifying the matte color with which the image data in the parent image has been preblended. The array consists of nnumbers, where n is the number of components in the color space specified by the ColorSpace entry in the parent image’s image dictionary; the numbers must be valid color components in that color space. If this entry is absent, the image data is not preblended.

 PdfProcesing: Add support for Transparency Group XObjects

Sometimes customers need to create documents using the CMYK colors to meet specific requirements for printing. Expose such functionality in PdfProcessing.

ArgumentNullException is thrown when resolving DecodeParms collection in Image XObject.