The page describes the new functionalities of Version 4.1.5 of the TFEL project.

This version was released on December 10, 2025 along with:

• Version 3.0.16,
• Version 3.1.16,
• Version 3.2.13,
• Version 3.3.8,
• Version 3.4.9,
• Version 4.0.6.

1 Issues fixed

1.1 Issue 839: [mfront] PhysicalConstants is inconsistently defined in material properties: quantities are always used, even if not requested

For more details, see https://github.com/thelfer/tfel/issues/839.

1.2 Issue 813: [implicit-dsl] smflag may not be defined for generalized behaviour

For more details, see https://github.com/thelfer/tfel/issues/813.

1.3 Issue 807: [mfront] Evaluation of external material properties shall be made after the evaluation of external models

For more details, see https://github.com/thelfer/tfel/issues/807.