[sita]

Hi there,

I'm working through the snappyHexMesh tutorials of Tobias Holzmann (http://voluntary.holzmann-cfd.de/tra...enfoam-project, they're brilliant by the way, thank you Tobias!), using foam-extend-4.0 on Ubuntu 18.04.

I've just created an eMesh file of my geometry stl by using surfaceFeatureExtract. When I try to convert this to an obj file using surfaceFeatureConvert, I get an error about the header of the eMesh file:

/*---------------------------------------------------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | foam-extend: Open Source CFD                    |
|  \\    /   O peration     | Version:     4.0                                |
|   \\  /    A nd           | Web:         http://www.foam-extend.org         |
|    \\/     M anipulation  | For copyright notice see file Copyright         |
\*---------------------------------------------------------------------------*/
Build    : 4.0-efcc2b1b7df8
Exec     : surfaceFeatureConvert triSurface/regionSTL.eMesh eMesh.obj
Date     : Jul 10 2018
Time     : 12:04:45
Host     : administrator-HP-Z4-G4-Workstation
PID      : 9164
CtrlDict : "/home/administrator/foam/administrator-4.0/run/cases/designVincent/system/controlDict"
Case     : /home/administrator/foam/administrator-4.0/run/cases/designVincent
nProcs   : 1
SigFpe   : Enabling floating point exception trapping (FOAM_SIGFPE).

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
Create time

Input features file  : "triSurface/regionSTL.eMesh"
Output features file : eMesh.obj

--> FOAM Serious Error : 
    From function IOobject::readHeader(Istream&)
    in file db/IOobject/IOobjectReadHeader.C at line 89
    Reading "/home/administrator/foam/administrator-4.0/run/cases/designVincent/constant/triSurface/regionSTL.eMesh" at line 2
    First token could not be read or is not the keyword 'FoamFile'

Check header is of the form:

/*--------------------------------*- C++ -*----------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | foam-extend: Open Source CFD                    |
|  \\    /   O peration     | Version:     4.0                                |
|   \\  /    A nd           | Web:         http://www.foam-extend.org         |
|    \\/     M anipulation  |                                                 |
\*---------------------------------------------------------------------------*/
FoamFile
{
    version     2.0;
    format      ascii;
    class       featureEdgeMesh;
    location    "constant";
    object      triSurface/regionSTL.eMesh;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //



--> FOAM FATAL IO ERROR: 
problem while reading header for object triSurface/regionSTL.eMesh

file: /home/administrator/foam/administrator-4.0/run/cases/designVincent/constant/triSurface/regionSTL.eMesh at line 2.

    From function regIOobject::readStream()
    in file db/regIOobject/regIOobjectRead.C at line 68.

FOAM exiting

Just to be sure I tried adding the OpenFOAM header, but then it gives an error on the first character that comes after the header ("incorrect first token, expected '(', found on line 18 the punctuation token '{' "). I'm afraid errors will keep coming even if I'd correct that one...

In other posts I noticed that others apparently had trouble with binary eMesh files, but that doesn't seem to be the problem in my case (it's plain text, us-ascii). It starts with

{
externalStart 6343;
internalStart 8052;
featureEdges 9210 ( 2 5

and then a long list of edge numbers. Has anyone seen this error before? And does anyone know what to do to get this working?

Thanks in advance!
Sita

[sita]

Alright, in the meantime I've installed OpenFOAM 6 next to my foam-extend-4.0, and with this everything works as expected. So apparently these functions don't work under foam-extend-4.0.