[Mugen996]

When running gmshToFoam airfoil.msh I get the following error.





```
--> FOAM FATAL IO ERROR:
Attempt to get back from bad stream

file: IStringStream.sourceFile at line 0.

From function bool Foam::Istream::getBack(Foam::token&)
in file db/IOstreams/IOstreams/Istream.C at line 56.

FOAM exiting
```


First few lines of airfoil.msh


```
$MeshFormat
4.1 0 8
$EndMeshFormat
$PhysicalNames
8
2 1 "back"
2 2 "front"
2 3 "top"
2 4 "exit"
2 5 "bottom"
2 6 "inlet"
2 7 "aerofoil"
3 8 "internal"
$EndPhysicalNames
$Entities
158 15 7 1
1000 1 0.00224 0 0
1001 0.98935 0.00357 0 0
1002 0.9593699999999999 0.0076 0 0
1003 0.92939 0.01203 0 0

```





I'm running OpenFoam 5 with gmsh 4.5.4.


Does anyone know a solution to this?

[Mugen996]

So turns out this is a file formatting issue between gmsh and gmshToFoam. To fix you need to convert the output of your meshing to msh2.


In my case it I had to change $ gmsh airfoil.geo -3 -o airfoil.msh > /dev/nul to gmsh airfoil.geo -3 -o airfoil.msh -format msh2 > /dev/nul