No standard fluid cells in the computation

Hi,
I ran the program and I got this error :
Error from cartesian_grid/vtk_out.f:2548

FATAL Error: There are no standard fluid cells in the computation.

Please verify geometry and mesh settings.

If using an STL file to define the geometry, this may be due to

normal vectors pointing in the wrong direction.
You find attached the zip file.
rotating_drumcalibration_2024-01-15T121448.676715.zip (63.6 MB)

I solved the problem.
I just check filter facets based on normals

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