undefined symbol: PyOS_string_to_double???

[cjo4m4fm]

When I implementing rdxplorer, an error occours:

u31chu06@alps6:/work/u31chu06/software/rdxplorer> ./run_NA12868.sh
Traceback (most recent call last):
File "rdxplorer.py", line 3, in <module>
import pileup as plp
File "/work/u31chu06/software/rdxplorer/pileup.py", line 3, in <module>
import v6
File "/work/u31chu06/software/rdxplorer/v6.py", line 6, in <module>
import file_utils as fu
File "/work/u31chu06/software/rdxplorer/file_utils.py", line 7, in <module>
import numpy as np
File "/pkg/biology/python_packages/lib/python2.7/site-packages/numpy/__init__.py", line 153, in <module>
from . import add_newdocs
File "/pkg/biology/python_packages/lib/python2.7/site-packages/numpy/add_newdocs.py", line 13, in <module>
from numpy.lib import add_newdoc
File "/pkg/biology/python_packages/lib/python2.7/site-packages/numpy/lib/__init__.py", line 8, in <module>
from .type_check import *
File "/pkg/biology/python_packages/lib/python2.7/site-packages/numpy/lib/type_check.py", line 11, in <module>
import numpy.core.numeric as _nx
File "/pkg/biology/python_packages/lib/python2.7/site-packages/numpy/core/__init__.py", line 6, in <module>
from . import multiarray
ImportError: /pkg/biology/python_packages/lib/python2.7/site-packages/numpy/core/multiarray.so: undefined symbol: PyOS_string_to_double
Doing this took 5 seconds
DONE.

Does anyone have any ideas about this??