fix atc mesh create_faceset gives "faceset is empty"?

Dear LAMMPS admin,

I am new in lammps and I wish to use atc package. I have created the geometry and tried to go step by step using the examples. However I have faced to the error "fix atc mesh create_faceset gives “faceset is empty” even I adjusted the dimension of the region very carefully.

I would highly appropriate any advise or comments.

Faithfully yours,
Maryam

Dear LAMMPS admin,

I am new in lammps and I wish to use atc package. I have created the geometry and tried to go step by step using the examples. However I have faced to the error "fix atc mesh create_faceset gives "faceset is empty" even I adjusted the dimension of the region very carefully.

I would highly appropriate any advise or comments.

as you may have noticed. there is not enough specific information here
to provide any advice. at the very least, you need to provide which
LAMMPS version you are using and on what platform you are running on,
and provide a sufficiently complete input deck, that allows to
reproduce the error message.

axel.