running script error

Submitted by umair rafiq on Tue, 02/21/2017 - 17:50

i m working on simulation of poly disperse flow of granular material . when i try to run script file in terminal it gives following error . can any body tell me whats the reason of this error

LIGGGHTS (Version LIGGGHTS-PUBLIC 3.3.1, compiled 2016-01-14-14:02:34 by kloss, git commit 9b1fc57b77c483deaf2c0a6c69241c5d4f91e3c2 based on LAMMPS 23 Nov 2013)
Created orthogonal box = (-0.075 -0.075 0) to (0.075 0.075 0.32)
1 by 1 by 1 MPI processor grid
ERROR: Fix particledistribution/discrete (id pdd1): not enough arguments (/build/liggghts-QCz4in/liggghts-3.3.1+repack1/src/fix_particledistribution_discrete.cpp:81)