We saw the following in our server logs for an instance where we were using Aspose.Words 4.4.2.0.
Object reference not set to an instance of an object. SourceAspose.Words StackTrace: at Aspose.Words.Paragraph.ओ(Int32 ՙ) at Aspose.Words.ListFormat.get_़() at Aspose.Words.Paragraph.get_IsListItem() at ...
Unfortunately we don’t have a document to correlate with the error, but I wondered if you know of cases in your code (possibly fixed in 5.2.0.0) where IsListItem for a paragraph can run into an “Object reference not set to an instance of an object” exception.