[SOLVED] fix massflow/mesh doubt

Dears,

I try to understand fix massflow/mesh command, but it doesn't work with a simple simulation :(
When I run it, the output file (massflow_mesh.dat) doesn't show the correct data, comparing with that I see in Paraview.

I use:
timestep 1e-6
E 5e6
fix mass_u all massflow/mesh mesh cad_base vec_side 0. -1. 0. count once file massflow_mesh.dat screen no writeTime

I attach the data123.tar_.gz with the complete input file (in.liggghts) and the corresponding meshes (stl files).

Regards,