Invalid pair style (../force.cpp:175)

Dear LAMMPS users,
Please help me to figure out what’s going on.
I am a new LAMMPS user and I’m trying to simulate a very simple system contains 4000 atoms of Al-Mg alloy, using MEAM potential in order to calculate the stress-strain curve.
But when I run my simulation I get this error: " ERROR: Invalid pair style (…/force.cpp:175) "
Please find below my input files for two different simulations.

Thanks in advance.
Any help I would appreciate.

AlCu.meam (611 Bytes)

library.meam (1.28 KB)

simulation-code.in (1.86 KB)

Dear LAMMPS users,
Please help me to figure out what's going on.
I am a new LAMMPS user and I'm trying to simulate a very simple system
contains 4000 atoms of Al-Mg alloy, using MEAM potential in order to
calculate the stress-strain curve.
But when I run my simulation I get this error: " ERROR: Invalid pair style
(../force.cpp:175) "

http://lammps.sandia.gov/doc/Section_errors.html