Tutorial with STL File

Hi everyone,
I would like to use Mfix to mesh a STL file.
I am still getting familiar with Mfix and so I have tested different tutorials and they all use existing geometry from Mfiy but I would like to know if some of you have some tutorials about how to use Mfix with STL file ?
I have different mistakes so I guess it comes from the geometry
Thanks in advance

The DEM and PIC mixer_3d tutorials both use several STL files.

Also the DEM rotating_drum_3d, conveyor_3d, cyclone_sms_3d, cyclone_flush_bc_3d, hopper_massinflow_psd, and screwfeeder_3d use STL.

– Charles