error in lammps command

here is my input script

variable T equal 300
variable T equal 300

besides the specific error message, that i have already commented on in the other e-mail thread, there are more problems coming your way after you have addressed that issue:

a) pair style reax is obsolete, you should be using the USER-REAXC package and pair style reax/c. if you update to a newer version of LAMMPS (highly recommended), then the REAX package is not going to be available anymore.

b) the ReaxFF parameter files have been generated for “real” units, not “metal”

c) ReaxFF simulations require an atom style with charges, e.g. atom style “charge”

d) because of c) you will need a modified data file, since the Atoms section is different for atom styles “atomic” and “charge”