Re: [sparta-users] [EXTERNAL] Edge not part of 2 vertices

[Moore, S. <st...@sa...>]

Christian,

Typically this occurs when your surface file has some issue and needs to be cleaned up. See more discussion here: https://github.com/sparta/sparta/issues/370. Do you see any warnings in the log file such as:

  4 tiny edges removed
WARNING: Surface check found 211 points nearly on triangles (../surf.cpp:1791)

If the mesh is correct it could in theory be a bug in SPARTA. In that case we'd need a complete minimal working example, ideally that runs on 1 MPI rank in a short amount of time.

Regards,

Stan
________________________________
From: Christian Ridings <cri...@mi...>
Sent: Friday, March 1, 2024 4:00 PM
To: spa...@li... <spa...@li...>
Subject: [EXTERNAL] [sparta-users] Edge not part of 2 vertices

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Hi Devs, all,



I was presented with the following error while trying to run a read_surf command:



ERROR on proc 0: CH: Edge not part of 2 vertices



The manual has this to say about the error:



“Edge not part of 2 vertices

This is an error when calculating how a 3d grid is cut or split by surface elements. It should not normally occur. Please report the issue to the SPARTA developers.”



I see that there is another post on this mailing list about this same issue from 2021 – is anyone aware of how that instance of the issue was resolved?



More potentially useful context:

  1.  I am using the latest release of SPARTA (13-Apr2023)
  2.  The command that threw the error had the form read_surf file.name trans x y z
  3.  This message was printed to the screen a few lines above the error in question: Cut3d failed on proc 0 in cell ID: 237759



Any insight is appreciated! In the meantime I will try to circumvent the error by creating my original STL slightly differently.



Cheers,



Christian





Christian Ridings

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Mechanical Engineer

L155 - Mechanical Systems and Prototype Development

cri...@mi...<mailto:cri...@mi...>

Office: 978-727-3574

Cell: 719-373-9060



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