For all issues regarding the Forums use, please, refer to the Forum Rules.

Our Solutions

Need professional assistance?
Consider our:

Support Offerings


Need to speed up your development?
Have a look at our:

Samples & Tools


Need some functionality extending standard OCCT capabilities?
Check out our:

Adv. Components

Open CASCADE Technology 6.5.4 is available for download!

Forum supervisor's picture

November 13, 2012

OPEN CASCADE SAS is pleased to announce a new public maintenance release of Open CASCADE Technology (version 6.5.4). This release introduces more than 200 modifications and bug fixes over previous maintenance release 6.5.3.

Most important improvements include:
- General code clean-up against compiler warnings, memory issues, and potential errors
- Thread safety of B-Spline cache and BRepMesh triangulator
- Multiple bug fixes in modeling algorithms (intersections, Boolean operations)
- Improvements of the naming mechanism (OCAF)
- Improved stability of Delaunay triangulation algorithm (BRepMesh)
- Improved Visualization (Open GL operations, image processing, display of shading with edges)
- Support of FTGL version 2.1.3rc5
- Express Mesh performance boosted through parallel execution

OPEN CASCADE Team would like to thank all external contributors for their support and efforts to improve OCCT!

Detailed information is available in Release Notes:

To download Open CASCADE Technology, please, visit our Download Center:

To learn more about our Products, please, visit our Value-added Software page:

Please, contact us for any additional information ( )

Sincerely yours,
OPEN CASCADE Development Team

PG's picture


Downloaded .. installed on my Win 7 desktop, execute Samples-Import/Export and the test harness.
- PG

Roman Lygin's picture

Congratulations with the release! Great to see good release cadence. Keep it up!

heXus's picture


Pawel's picture

Dear Forum supervisor,

I wasn't sure where to place this post... so I hope it's OK to put it here.

After this forum was restructured and divided into sections last year I must admit for me it became less transparent due to the difficulty to track the new posts and the existing discussions.

Personally, I tend to monitor only one section not to get distracted too much... The e-mail notifications do not help either...

Hence, I can think of an improvement that could minimize the problem: That would be a section 'Recent posts/threads' (exactly the same feature as implemented on the development portal) where each registered user could track (and maybe mark for his own purposes) new/read threads from different forum sections.

Do you think such a feature can be implemented?


Forum supervisor's picture

Dear Pawel,
It seems very good idea.
We will check it and will analyze the possibility to implement it.
Thanks for your input.