build issues in Cent OS 6

Using the default MAKE/Makefile.serial makefile, I was able to build the version of LAMMPS from the git repository as of Noon, Easter time on Oct 24. The build finished, but I get the following error when I try to run lammps-examples/comb/in.comb.Si

  ~/lammps-src/lammps-build/src/lmp_serial < in.comb.Si
LAMMPS (23 Oct 2012)
Lattice spacing in x,y,z = 5.43 5.43 5.43
Created orthogonal box = (0 0 0) to (21.72 21.72 21.72)
   1 by 1 by 1 MPI processor grid
Created 512 atoms
ERROR: Invalid pair style (force.cpp:168)

I've also tried building with openmpi and get the same error. Is this a problem with my build or with the examples?
                  Thanks,
                        Spencer Davis

Using the default MAKE/Makefile.serial makefile, I was able to build the
version of LAMMPS from the git repository as of Noon, Easter time on Oct
24. The build finished, but I get the following error when I try to run
lammps-examples/comb/in.comb.Si

  ~/lammps-src/lammps-build/src/lmp_serial < in.comb.Si
LAMMPS (23 Oct 2012)
Lattice spacing in x,y,z = 5.43 5.43 5.43
Created orthogonal box = (0 0 0) to (21.72 21.72 21.72)
   1 by 1 by 1 MPI processor grid
Created 512 atoms
ERROR: Invalid pair style (force.cpp:168)

you didn't install the manybody package before compiling.

I've also tried building with openmpi and get the same error. Is this a
problem with my build or with the examples?

with your build. some packages are optional.

lmp_openmpi -h will tell you what is included in your executable.

see the documentation for details.

cheers,
     axel.