Released: May 25, 2026

Updates in 2026.6.0.1

Features

• Added support for 40+ modern Excel _xlfn.* functions, improving EvaluateAll() compatibility with Microsoft 365 workbooks.
• Updated internal dependencies.

Fixes

• Known Issues:
  • Range.Value = <python int> stores an empty string instead of the integer (formulas reading the cell resolve to 0). Use IntValue or a Python float as a workaround; .NET is unaffected.

Released: Sep 3, 2025

Updates in 2025.9.0.1

Features

• Updated the IronSoftware.System.Drawing to 2025.9.3.

Released: Aug 14, 2025

Updates in 2025.8.0.3

Features

• Updated IronSoftware.System.Drawing to 2025.8.1.

Released: Aug 4, 2025

Updates in 2025.7.0.15

Features

• Updated IronSoftware.System.Drawing to 2025.7.2.

Released: Jun 5, 2025

Updates in 2025.6.0.2

Features

• Updated IronSoftware.System.Drawing to version 2025.6.2.

Fixes

• Fixed an issue where the LastFilledCell property incorrectly returned null for worksheets with sparse data.
• Fixed an issue where CreateNamedTable corrupts Excel file when adding tables to different sheets.

Released: May 10, 2025

Updates in 2025.5.0.4

Features

• Updated IronSoftware.System.Drawing to version 2025.5.2.
• Updated IronSoftware.Common to version 2025.3.1.

Fixes

• Fixed an issue where Rows.Length returns an incorrect value when used with Excel files containing more than 500 rows.

Released: Apr 10, 2025

Updates in 2025.4.0.5

Features

• Updated IronSoftware.System.Drawing to 2025.3.6.
• Updated IronSoftware.Common to version 2025.3.1.

Released: Mar 6, 2025

Updates in 2025.3.0.1

Features

• Updated IronSoftware.System.Drawing to 2025.3.5.
• Updated IronSoftware.Common to 2025.2.3.

Released: Feb 6, 2025

Updates in 2025.2.0.5

Features

• Updated IronSoftware.System.Drawing to version 2025.1.6.

Released: Jan 16, 2025

Updates in 2025.1.0.1

Features

• Updated IronSoftware.Common to 2024.11.4.
• Updated dependency packages to address known security vulnerabilities.

Fixes

• Fixed an issue where loading and saving .xlsm files threw exceptions.
• Fixed an issue where loading Excel files caused an "equivalent part names" exception.
• Fixed an issue where adding rows broke formulas.
• Fixed an issue where loading Excel files with invalid data validation threw exceptions.
• Fixed an issue where setting the number format caused the generated HTML font...