errors on modifying lj/cut and mpirun

Hello, LAMMPS users & Developers:

I modify the pair_lj_cut.cpp /*.h. When I run mpirun -np 1 lmp_mpi<, it works. There’s no any warning or error message.

but When I run mpirun -np 2 lmp_mpi<, it doesn’t work, and system sends me a message below:

i already told you, this must be due to a programming error.
this is nothing specific to LAMMPS. …and it is impossible to give any specific advice on such a generic question.
everything in LAMMPS is related to mpirun since LAMMPS is parallelized with MPI.