Incorrect args for pair coefficients (src/MANYBODY/pair_eam_fs.cpp:52)

Incorrect args for pair coefficients (src/MANYBODY/pair_eam_fs.cpp:52) how to fix this error?
units metal
dimension 3
boundary s s s
atom_style atomic
#atom_modify id yes map array

----------------------- ATOM DEFINITION ----------------------------

lattice bcc 2.85 orient x 1 0 0 orient y 0 1 0 orient z 0 0 1
region box block 0 3 0 3 0 9 units lattice
create_box 3 box
create_atoms 1 box
region lower block INF INF INF INF INF 3 units box
region upper block INF INF INF INF 22.65 INF units box
group lower region lower
group upper region upper
group boundary union lower upper
group body subtract all boundary
set group lower type 2
set group upper type 3

mass * 55.845 #######
write_data model.data #######

pair_style eam/fs
pair_coeff * * Fe_mm.eam.fs

Obviously you need to correct the pair_coeff command in your input file.
Please carefully study the documentation for the eam/fs pair style and the pair_coeff command.