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Votes

NullReferenceException after saving PDF with Korean text annotations

First, I want to express my sincere gratitude for fixing the Korean text input issue in FreeText annotations (version 29.1.37). The fix has greatly improved our application's usability for Korean users.


However, after updating to this latest version, we are now experiencing a new error when trying to reopen PDFs with Korean text annotations.


Error details:

System NullReferenceException

HResult equals 0x80004003

Message equals Object reference not set to an instance of an object

Source equals Syncfusion Pdf Base

StackTrace

Error occurs in UnicodeTrueTypeFont EqualsToFont method at line 357



Steps to reproduce:


Open a PDF document in the viewer

Add a FreeText annotation with Korean text

Save the PDF

Close the PDF

Reopen the same PDF

The above exception occurs

Environment:


Syncfusion PDF Viewer for WPF version 29.1.37

Windows 10/11

.NET Framework

Additional information:


This issue started appearing after updating to the version that fixed the Korean text input problems

The error occurs in the same component UnicodeTrueTypeFont that would be involved in proper Korean text rendering

We can save PDFs with annotations successfully, but cannot reopen them without errors

This seems to be a regression issue related to the recent fix for Korean text input in FreeText annotations. I appreciate your continued support in resolving this new issue.