Positions where pt and p2 variables are written:

x(lpoint), y(mpoint), z(npoint), lpoint, mpoint, npoint=
  -3.0442      -3.0442      -3.0442          67    67    67

kx_fft(ikx+ipx*nx),ky_fft(iky+ipy*ny),kz_fft(ikz+ipz*nz)=
   63.000       63.000       63.000