# From HELYX OS to Paraview ==\> No meshes

**URL:** https://discourse.paraview.org/t/from-helyx-os-to-paraview-no-meshes/12431
**Category:** ParaView Support
**Created:** [July 1, 2023, 9:28am UTC](https://discourse.paraview.org/t/from-helyx-os-to-paraview-no-meshes/12431 "2023-07-01T09:28:08Z")
**Posts on this page:** 3
**Page:** 1

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### Author: ![\_misterwhy](https://discourse.paraview.org/user_avatar/discourse.paraview.org/_misterwhy/32/11919_2.png) [@\_misterwhy](https://discourse.paraview.org/u/_misterwhy)
#### Post date: [July 1, 2023, 9:28am UTC](https://discourse.paraview.org/t/from-helyx-os-to-paraview-no-meshes/12431/1 "2023-07-01T09:28:08Z")

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Hello everyone !

First I have to mention that I’m a total newbie with these program, for installation I just follow tutorial on youtube.

And to know how to use it I was following this [tutorial](https://youtu.be/ozLMor75PA0)

But when I’m at the 7:30 Paraview insult me with this :

> ERROR: In vtkOpenFOAMReader.cxx, line 11320  
> vtkPOpenFOAMReader (0x168e8160): /home/misterwhy/Téléchargements/Engys/HELYX-OS/v2.4.0/eggs/eggs.foam contains no meshes.
> 
> ERROR: In vtkExecutive.cxx, line 741  
> vtkPVCompositeDataPipeline (0x15eeeea0): Algorithm vtkPOpenFOAMReader (0x168e8160) returned failure for request: vtkInformation (0x1698e120)  
> Debug: Off  
> Modified Time: 392079  
> Reference Count: 1  
> Registered Events: (none)  
> Request: REQUEST\_INFORMATION  
> ALGORITHM\_AFTER\_FORWARD: 1  
> FORWARD\_DIRECTION: 0

[eggs.zip](https://discourse.paraview.org/uploads/short-url/AlUZxPSjlodWrHSWc0BjvSRtNiw.zip) (631.1 KB)

Do you have any idea that could save me ?

Thanks in advance 😉

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### Author: ![mwestphal](https://discourse.paraview.org/user_avatar/discourse.paraview.org/mwestphal/32/17_2.png) [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [July 3, 2023, 5:15am UTC](https://discourse.paraview.org/t/from-helyx-os-to-paraview-no-meshes/12431/2 "2023-07-03T05:15:27Z")

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Well, the OpenFOAM reader tells you there is no mesh in your openFOAM simulation, specifically it checks for:

```auto
    hasDefaultRegion = vtkFoamFile::IsFile(constantPath + "polyMesh/faces", true);

    for (vtkIdType entryi = 0; entryi < dir->GetNumberOfFiles(); ++entryi)
    {
      std::string subDir(dir->GetFile(entryi));
      if (subDir != "." && subDir != ".." && dir->FileIsDirectory(subDir.c_str()) &&
        vtkFoamFile::IsFile((constantPath + subDir + "/polyMesh/faces"), true))
      {     
        regionNames.push_back(std::move(subDir));
      }     
    }

    if (!hasDefaultRegion && regionNames.empty())
    {
      vtkErrorMacro(<< this->FileName << " contains no meshes.");
      return 0;
    }

```

As to why this is the case, maybe you want to ask on a OpenFOAM forum 🙂

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### Author: ![aerogt3](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/a/3bc359/32.png) [@aerogt3](https://discourse.paraview.org/u/aerogt3)
#### Post date: [April 29, 2024, 9:14pm UTC](https://discourse.paraview.org/t/from-helyx-os-to-paraview-no-meshes/12431/3 "2024-04-29T21:14:33Z")

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It could be helpful to look elsewhere for the polyMesh/faces file? Most OpenFOAM cases are run in parallel, and left decomposed, so constant/polyMesh may not exist.