Sketch on surface thickness don't work with splines

[Anthony-Gaudino]

I created a Sketch on surface from a cylinder face, when I create a spline in the mapped sketch, when I add a value to the thickness parameter, it does not create a lateral surfaces between the top and bottom surfaces.

It works with other sketch elements:

[avgeeklucky]

Not sure it's a splines issue. For me I'm getting errors on concave and convex surfaces.

I created some examples to help try and find the culprit: curve-bug.zip

In the example file I get this error:

13:41:42  Traceback (most recent call last):
  File "C:\Users\Lucky\AppData\Roaming\FreeCAD\Mod\Curves\.\freecad\Curves\Sketch_On_Surface.py", line 318, in execute
    f2 = face.makeOffsetShape(obj.Offset+obj.Thickness, 1e-7)
<class 'Part.OCCError'>: BRepOffsetAPI_MakeOffsetShape not done
13:41:42  Recompute failed!

In another example, thandle6.zip, with a more complex sketch (svg import) I get another error. Removing all the splines here does seem to work though.

13:46:31  <Exception> Access violation
13:46:31  Traceback (most recent call
 last):
  File "C:\Users\Lucky\AppData\Roaming\FreeCAD\Mod\Curves\.\freecad\Curves\Sketch_On_Surface.py", line 333, in execute
    ruled = Part.makeRuledSurface(shapes_1[i].Edges[j], shapes_2[i].Edges[j])
<class 'RuntimeError'>: FreeCAD exception thrown (Access violation)
13:46:31  Recompute failed!

Version Info:

OS: Windows 10 build 19045
Word size of FreeCAD: 64-bit
Version: 0.21.2.33771 (Git)
Build type: Release
Branch: releases/FreeCAD-0-21
Hash: b9bfa5c5507506e4515816414cd27f4851d00489
Python 3.8.10, Qt 5.15.2, Coin 4.0.1, Vtk 8.2.0, OCC 7.6.3
Locale: English/United Kingdom (en_GB)
Installed mods: 
  * Curves 0.6.23

[andreadinale]

I can confirm, not a splines issue. If i have "Fill faces" set true, i obtain this error when i try to set thickness. With "Fill faces" set to false no error.

FreeCAD 0.21.2 and 0.21.1 Curves last master release (21/May/2024)

12:34:44 Access violation 12:34:44 Traceback (most recent call last): File "C:\Users\andrea\AppData\Roaming\FreeCAD\Mod\Curves.\freecad\Curves\Sketch_On_Surface.py", line 358, in execute ruled = Part.makeRuledSurface(shapes_1[i].Edges[j], shapes_2[i].Edges[j]) <class 'RuntimeError'>: FreeCAD exception thrown (Access violation) 12:34:44 Recompute failed!