[Wannier] Error when using pw2wannier90.x

[Pang Rui]

Dear all
I am working on a slab system that contains 73 Ni and 60 C. When I use
pw2wannier90.x the code always ends at the first 
     Program PW2WANNIER v.5.1.1 starts on 17Nov2014 at  0:19:21 

     This program is part of the open-source Quantum ESPRESSO suite
     for quantum simulation of materials; please cite
         "P. Giannozzi et al., J. Phys.:Condens. Matter 21 395502 (2009);
          URL http://www.quantum-espresso.org", 
     in publications or presentations arising from this work. More details
at
     http://www.quantum-espresso.org/quote

     Parallel version (MPI), running on    48 processors
     R & G space division:  proc/nbgrp/npool/nimage =      48
and show message like
mpirun noticed that process rank 0 with PID 41687 on node fn002 exited on
signal 11 (Segmentation fault)
I do not think it is because insufficient memory because the pwscf.save is
only 4M. Did anyone meet this problem before? 

The following is the input file
&inputpp 
   outdir = './'
   seedname = 'ni_down'
   spin_component = 'down'
   write_mmn = .true.
   write_amn = .true.

-- 
PostDoc
Department of Physics, South University of Science and Technology of China
Shenzhen, Guangdong, PRC, 518500