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Open CASCADE Technology 8.0.1 is now available!

31 Jul 2026

OCCT 8.0.1 is the first regular maintenance release in the 8.0 series. It consolidates the fixes, performance improvements, and build updates merged after 8.0.0p1.

The main focus of this release is modeling reliability, shape healing, periodic geometry, meshing, STEP export, concurrent fillet construction, and Windows/MSYS2 integration.

π‘―π’Šπ’ˆπ’‰π’π’Šπ’ˆπ’‰π’•π’”:
βœ… More reliable Boolean operations and periodic B-spline processing
βœ… Shape-healing fixes for missing pcurves, replaced faces, empty wire sequences, non-manifold boundaries, and periodic conical faces
βœ… Faster face validation and curve-on-surface deviation checks
βœ… Thread-safe fillet reconstruction for independent parallel operations
βœ… More robust STEP export, including long-string handling and restored healing parameters
βœ… Improved meshing at periodic seams
βœ… Better CMake integration for Windows, TBB, FreeType, and MSYS2

The C++17 baseline and the core API and ABI introduced with 8.0.0p1 remain unchanged.

Thank you to everyone who reported issues, contributed fixes, reviewed changes, and helped validate this release.

𝑹𝒆𝒂𝒅 𝒕𝒉𝒆 𝒇𝒖𝒍𝒍 𝒓𝒆𝒍𝒆𝒂𝒔𝒆 𝒏𝒐𝒕𝒆𝒔:
https://github.com/Open-Cascade-SAS/OCCT/releases/tag/V8.0.1

Full changelog:
https://github.com/Open-Cascade-SAS/OCCT/compare/V8_0_0_p1…V8_0_1

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