Pair_style error on Hugoniostat example

Hi I am trying to run the Hugnoistat example in the 4Dec 2011 Version of Lammps, and I get the following error, how do I go about fixing this?

pair_style lj/cubic
ERROR: Invalid pair style

Hi I am trying to run the Hugnoistat example in the 4Dec 2011 Version of
Lammps, and I get the following error, how do I go about fixing this?
pair_style lj/cubic
ERROR: Invalid pair style

it works for me. what is the first line of output
of your lammps executable. are your really running
the 4 dec 2011 version?

axel.