#1145107 src:netgen: netgen 6.2.2605 introduced a breaking change for FreeCAD (API refactored)

Package:
netgen
Source:
netgen
Description:
Automatic 3d tetrahedral mesh generator
Submitter:
Tobias Frost
Date:
2026-08-23 11:15:02 UTC
Severity:
normal
#1145107#5
Date:
2026-08-22 16:14:29 UTC
From:
To:
Hi,

netgen has refactored in 6.2.2605 the Segments interface [1].
Unfortuntatly FreeCAD is using this interface for salmonmesh,
therefore causing FTBFS. This (I believe) has been reported upstream as [2].
Unfortuntaly I could only come up with an partial fix, see [2].

I can disable the netgen plugin in FreeCAD, but this will lose
functionality.

Do you have an idea how to solve the issue?

Would it be a possiblity to revert the upload to 2604 until FreeCAD
upstream has found an solution?

[1] https://github.com/NGSolve/netgen/commit/074bc99a7c4ae247d8afb9aa60c4c436d99621b7
[2] https://github.com/FreeCAD/FreeCAD/issues/32105
#1145107#12
Date:
2026-08-22 18:07:11 UTC
From:
To:
Hi Tobi,
apologies for causing the problem, I didn't realize that there was this breaking
change.

I can revert the upload, but can we wait a few days to see if FreeCAD upstream
provides a patch quickly? The issue you linked was just opened 11 hours ago (on
a weekend). Do they typically answer quickly to these issues?

Thanks,
Francesco
#1145107#17
Date:
2026-08-23 06:53:47 UTC
From:
To:
Hi Francesco,

Thanks for your quick reply!

I agree, we should wait if upstream comes up with an solution;
(there is also no urgency, as e.g med-fichier is RC-buggy and will
prevent FreeCAD to migrate to testing anyways.)
#1145107#22
Date:
2026-08-23 11:12:09 UTC
From:
To:
Hi Francesco,

After FreeCAD upstream pointed into this direction:
"2606" seems not to be a "release", it has been only tagged upstream,
but it is not showing up as a release. Maybe 2606 isn't intended as a
release, maybe upstream changed how they release, I don't know, just
wanted to add this observation...

Still no urgency; (I've disabled netgen usage in FreeCAD for the
moment.)