(OCC 6.5.3 regression) BRepBuilderAPI_Sewing returns wrong result

The following sewing operation returns a wrong result in OCCT 6.5.3. The result is correct in OCCT 6.5.2.

Draw script:

restore Volute1.brep v
explode v
sewing r 0.01 v_1 v_2
vdisplay r

Should I report this problem in the bug tracker or isn't it a regression?

Kind regards,

Timo Roth's picture

Here is an illustrative image for the problem.

Forum supervisor's picture

Dear Timo,
I would like to inform you that the posted problem has been checked and reproduced.
It looks like regression regarding to OCC6.5.2.
We suggest you to register the issue in Mantis Bugtracker which is available now via the Collaborative portal - http://dev.opencascade.org/index.php?q=home/get_involved.
You are also welcome to develop a corresponding patch and make a contribution via the Collaborative portal.

Pawel's picture

Hi Timo,

I don't know if it's a regression but the problem does exist for sure.

I tested your example against the current OCCT version from the repository and ended up with the same result as you.

So I think it's worth reporting.


Timo Roth's picture

OK, I reported the problem in the bug tracker: