NullReferenceException is thrown when importing a tagged document that contains a structure element with a /C attribute class but no /ClassMap.
NullReferenceException: 'Object reference not set to an instance of an object.' Telerik.Documents.Fixed.FormatProviders.Pdf.Import.StructureElementsImportContext.ClassMap.get returned null.Excessive text wrapping and row heights due to columns collapsing to excessively narrow widths when the total column width exceeds the table width.
Regression in versions after 2026.3.810.
Workaround: Manually readjust the column Width values.
Handle the import of documents that have an invalid boolean value for the PrintScaling property of ViewerPreferences. The expected value of the /PrintScaling entry is a PDF name object:
/PrintScaling /None
/PrintScaling /AppDefault
When importing such documents, the following exception is thrown:
InvalidCastException: 'Unable to cast object of type 'Telerik.Documents.Fixed.FormatProviders.Pdf.Model.Types.PdfBool' to type 'Telerik.Documents.Fixed.FormatProviders.Pdf.Model.Types.PdfName'.'