Commit JT 032719

        // no Perpendicular nudging force option active yet

	if (kspringPerp != 0.0) 

	  error->all(FLERR,"NEB_spin Perpendicular nudging force not yet active");

	  error->all(FLERR,"NEB_spin Perpendicular spring force not yet active");

      }

  }

  if (NEBLongRange) 

    error->all(FLERR,"NEB_spin long range option not yet active");

  // test output length

  //printf("testi irep / plen: %d %g \n",ireplica,nlen);

  // exit calc. if first or last replica (no gneb force)

  if (ireplica == 0 || ireplica == nreplica-1) return ;