running neb calculation

Dear Lammps users

i am trying to run neb calculation using in.neb.sivac from example directory on my laptop but these erors reported. can you help me to solve it?

mpirun -np 3 lmp_openmpi -partition 3x1 -in in.neb.sivac
ERROR: Processor partitions are inconsistent (…/lammps.cpp:214)
ERROR: Processor partitions are inconsistent (…/lammps.cpp:214)

ERROR: Processor partitions are inconsistent (…/lammps.cpp:214)

Best Regard.

Dear Lammps users

i am trying to run neb calculation using in.neb.sivac from example
directory on my laptop but these erors reported. can you help me to solve
it?

mpirun -np 3 lmp_openmpi -partition 3x1 -in in.neb.sivac
ERROR: Processor partitions are inconsistent (../lammps.cpp:214)
ERROR: Processor partitions are inconsistent (../lammps.cpp:214)
ERROR: Processor partitions are inconsistent (../lammps.cpp:214)

the fact that the error message is printed three times suggests that
either your lammps binary is not properly compiled as a parallel
binary or that the mpirun command belongs to a different MPI library
than what was used to compile LAMMPS.

are you able to run other calculations correctly in parallel?

axel.