Phonon Dispersion

Dear LAMMPS users,
I am working on phonon dispersion and after following the instructions clearly given in the “README” file of lammps/examples/USER/phonon directory, Each time I get a “segmentation fault” after this command :

"./phana Graphene.bin.6000000 < in.disp " . After this, I tried to run the same command again by reducing the number of runs from 6000000 to 500 , but still I got the same fault.

So, Kindly help me if any other way possible.

Thanks in advance.

I am also facing the same problem.