A surface from edges results in a hang-up

[krisA]

Hello,

When I try to build a surface from a series of edges I never get to a result. The cursor changes to a blue spinning circle and I notice that all available memory get allocated and processor load is indicated as very high, but no surface appears.
It makes no difference it I try this from the Surface WB or the Part WB, or if I join some edges before into an that is larger.
I stripped my real model down to just some essential lines and curves but with the same result.
Here you see the order for selecting edges and after the 3th one it hangs.

surfaceHangup.png (93.3 KiB) Viewed 886 times

My setup is this:
OS: Windows 10 (10.0)
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.19.22846 (Git)
Build type: Release
Branch: master
Hash: 1f46b72491a0008384a6db4f2615a656249f6f08
Python version: 3.6.8
Qt version: 5.12.1
Coin version: 4.0.0a
OCC version: 7.3.0
Locale: Dutch/Netherlands (nl_NL)

It anyone wants to give it a try, my test file is attached.
Thanks in advance for helping me get around this.

best regards,
KrisA

[chrisb]

Works flawless here:

SnipScreenshot-15eabc.png (19.02 KiB) Viewed 864 times

Please try to upgrade to the latest 0.19.

OS: macOS 10.15
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.19.23578 (Git)
Build type: Release
Branch: master
Hash: 50c3cbf00579dc4941ca743c25720d016b0453ce
Python version: 3.8.6
Qt version: 5.12.5
Coin version: 4.0.0
OCC version: 7.4.0
Locale: C/Default (C)

[edwilliams16]

Screen Shot 2021-01-19 at 12.57.56 PM.png (58.86 KiB) Viewed 855 times

In Part|Shape|Builder|Face from Edges selecting the entire closed loop of edges, I get the above. It is a surface, but I doubt it is the one desired.

Freecad 0.19-23323

[edwilliams16]

Surface Workbench Surface|Filling is more like what is intended, I expect.

Screen Shot 2021-01-19 at 1.36.33 PM.png (36.48 KiB) Viewed 838 times

[krisA]

Thanks for checking my file. I upgraded to the latest windows release 23683 but that gives identical behaviour.
Could it be that not being able to create the surface is related to my hardware (PC is Dell with Corei5-2320@3GHz and about 7 or 8 years old now) or graphics card (AMD Radeon HD 6450) and its driver SW (version15.201.1151.1008 of 2015-11-04)?
Any help on getting the surface WB to show my surface is appreciated.

best regards,
KrisA

[krisA]

I now also checked a different windows build: the Conda one.
And that gives a much better result without the hang-up reported earlier.

surface-conda.png (176.93 KiB) Viewed 723 times

So to everyone struggling with surfaces, I recommend a switch to the windows Conda build.
This is the info shown by the working FreeCAD:
OS: Windows 10 (10.0)
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.19.23721 (Git)
Build type: Release
Branch: master
Hash: 4c323a63258b94903290fb23426be240c8663950
Python version: 3.8.6
Qt version: 5.12.5
Coin version: 4.0.0
OCC version: 7.4.0
Locale: Dutch/Netherlands (nl_NL)

Maybe a warning could be placed on the 0.19 download page that the LP build is less robust then the Conda one for some operations (e.g. surface creation).

best regards,
KrisA

[Kunda1]

Maybe a warning could be placed on the 0.19 download page that the LP build is less robust then the Conda one for some operations (e.g. surface creation).

JFYI

[edwilliams16]

@krisA So that was the surface you were looking for? It deviates a long way from the edge loop!

[kisolre]

If it is OCC 7.4.0 against 7.3.0 it is as we know out of FreeCAD hands. And the new LibPack is 7.5.0...

[krisA]

@edwilliams16 No, actually not. I want to refine the surface with some intermediate profile curves. But the file I posted is just a test case.
I already checked with 1 intermediate curve and the surface adapts to it: very fine. I hope to use this technique in my real model where there are about 31 intermediate curves.
And now, with the help and responses on this forum, I feel to have some backup from experts in finally reaching a decent hull shape.

thanks and best regards,
KrisA