Hello, I am able to reproduce this consistently with the attached code.
When the nanosecond portion of an OffsetDateTime falls in [999_500_000 … 999_999_999] it gets read back as a string which triggers an exception if …...Product Family aspose-cells-java , cells-java wwats June 29, 2026, 9:50pm...getDateTimeValue(). AsposeNanoRepro.zip (1.1 KB) Professionalize.Cells...