When loading a PDF generated with PdfProcessing in PDF Accessibility Checker 2021 (PAC) an exception is thrown: "Object reference not set to an instance of an object".

It is reproducible with all PdfComplianceLevel export options.

InvalidCastException caused by colorspace defined as nested indirect objects.

Unable to cast object of type 'Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Types.IndirectReference' to type 'Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Types.PdfName'.

Importing a document containing an EI keyword not followed by space or return leads to an endless loop and the document is not imported successfully.

Expected:

Actual:

Some documents loaded through WordsProcessing and then exported to a RadFixedDocument by utilizing the ExportToFixedDocument() method, fails on export through ImageFormatProvider with System.AggregateException.

As a workaround, you can export the RadFixedDocument to a PDF and then import it again before exporting it to an image.

var pdfFixedProvider = new Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.PdfFormatProvider();
bytes = pdfFixedProvider.Export(fixedDocument);
fixedDocument = pdfFixedProvider.Import(bytes);