Released: Mar 30, 2026

Updates in v8.5.1

Fixes

• Negation of numeric string values now returns the negated number instead of a #VALUE! error in the formula calculation.
• 'ExcelPackage.Configure' now sets 'IConfiguration' for license info.
• The WEEKDAY function now handles optional return-types 12-17 correctly.
• Inserting rows or columns when a named range is on the maximum row is now handled correctly. Absolute referenced defined names become #REF! when pushed outside the maximum.
• NUMBERVALUE function now parses decimal and group separators for numbers correctly.
• Conditional formatting priority now remains correct after loading workbook with conditional formatting rules and add new.