Open CASCADE Technology 6.5.3 beta version is available for testing.


Dear Open Source Community,

OPEN CASCADE SAS is pleased to announce a beta version of Open CASCADE Technology (OCCT) 6.5.3. This version is provided for beta testing only. It is intended for those users who are interested in having a preview of the forthcoming release, are ready to test it, and invest their time in detection and reporting problems.

The beta version is available in source package only, please download it at [1]. See file BUILD.Linux or BUILD.Windows to get quick instructions for building OCCT on your platform. See also a short overview of changes in this release on OCCT development portal [2] to quickly spot the functionality needing special attention.

If you detect any regressions or critical problems on this version within your applications, please report those either in this thread or in Mantis, and we will do our best to fix such problems before the release. The release is scheduled for April 16, thus early reporting of the problems is appreciated.

Thank you in advance for taking part in beta testing!

Open CASCADE Support Team


jelle's picture

A bug tracker, git and now the open source "Release early, release often" mantra...
This is great news, there's quite a cultural shift in the OCC project going on and I like what I see ;D

Roman Lygin's picture

I just wanted to give public kudos to the team. For several last months you have been raising the bar for yourself and delivering!
Making the bug tracker open has been enlightening to all of us to see what's going on behind the scene and how much efforts a good fix can cost.

Hats off! You guys rock! Keep it up!

Gilles DAVID's picture


The file is missing in the package.
make install stops in error.


Gilles DAVID's picture

Indeed the file name is