[Owen99]

Hello,
I'm a third year student trying to use snappyHexMesh on dsmcFoam.
I've made an object in solidworks (just to get the simulation running) and saved it as an STL file, being careful to ensure its in ascii etc.
Then I change all the relevant parts of the surfaceFeatureExtractDict to the name of the STL file.
When I then run surfaceFeatureExtract the following error comes up.

/*---------------------------------------------------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: v2006 |
| \\ / A nd | Website: www.openfoam.com |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
Build : _b45f8f6f58-20200629 OPENFOAM=2006
Arch : "LSB;label=32;scalar=64"
Exec : surfaceFeatureExtract
Date : Dec 27 2020
Time : 19:12:26
Host : DESKTOP-F47FKAM
PID : 2298
I/O : uncollated
Case : /home/owen/OPENFOAM4/flange
nProcs : 1
trapFpe: Floating point exception trapping enabled (FOAM_SIGFPE).
fileModificationChecking : Monitoring run-time modified files using timeStampMaster (fileModificationSkew 5, maxFileModificationPolls 20)
allowSystemOperations : Allowing user-supplied system call operations

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


Note: Feature line extraction only valid on closed manifold surfaces

Reading surfaceFeatureExtractDict



--> FOAM FATAL ERROR:
No surfaces specified/found for entry: Part.stl

From int main(int, char**)
in file surfaceFeatureExtract.C at line 305.

FOAM exiting

************************************************** **
However when I run the inbuilt blob file, it works fine.

Do I need to convert to stl.gz for this to work? If so how could I do this on solidworks/another program.

Any help would be greatly appreciated!

Thanks