[Python-modules-team] Bug#444124: fftpack/_fftpack.so: undefined symbol: zfftnd_fftw

Kumar Appaiah akumar at ee.iitm.ac.in
Wed Sep 26 08:25:47 UTC 2007

Package: python-scipy
Version: 0.6.0-1
Severity: serious

Dear SciPy maintainers,

SciPy 0.6.0 gives me this error when I try plotting with matplotlib:
% python p.py
Traceback (most recent call last):
File "plotit.py", line 3, in ?
from scipy import *
File "/usr/lib/python2.4/site-packages/scipy/fftpack/__init__.py", line 10, in ?
from basic import *
File "/usr/lib/python2.4/site-packages/scipy/fftpack/basic.py", line 13, in ?
import _fftpack as fftpack
ImportError: /usr/lib/python2.4/site-packages/scipy/fftpack/_fftpack.so: undefined symbol: zfftnd_fftw

The source file is this:
from scipy import *
from pylab import *


Needless to say, SciPy 0.5.2 doesn't give this error. I couldn't zero
in on the error. Could you please look into where the problem could


-- System Information:
Debian Release: lenny/sid
  APT prefers unstable
  APT policy: (990, 'unstable'), (500, 'testing'), (500, 'stable')
Architecture: i386 (i686)

Kernel: Linux (SMP w/2 CPU cores; PREEMPT)
Locale: LANG=en_US, LC_CTYPE=en_US (charmap=ISO-8859-1) (ignored: LC_ALL set to en_US)
Shell: /bin/sh linked to /bin/bash

Versions of packages python-scipy depends on:
ii  atlas3-base [liblapack 3.6.0-20.6        Automatically Tuned Linear Algebra
ii  fftw2                  2.1.3-20          library for computing Fast Fourier
ii  lapack3 [liblapack.so. 3.0.20000531a-6.1 library of linear algebra routines
ii  libc6                  2.6.1-1+b1        GNU C Library: Shared libraries
ii  libg2c0                1:3.4.6-6         Runtime library for GNU Fortran 77
ii  libgcc1                1:4.2.1-5         GCC support library
ii  libstdc++6             4.2.1-5           The GNU Standard C++ Library v3
ii  libsuitesparse         3.0.0-6.1         collection of libraries for comput
ii  python                 2.4.4-6           An interactive high-level object-o
ii  python-central         0.5.15            register and build utility for Pyt
ii  python-imaging         1.1.6-1           Python Imaging Library
ii  python-numpy           1:1.0.3-1         Numerical Python adds a fast array
ii  refblas3 [libblas.so.3 1.2-8             Basic Linear Algebra Subroutines 3

Versions of packages python-scipy recommends:
ii  g++ [c++-compiler]            4:4.2.1-5  The GNU C++ compiler
ii  g++-4.0 [c++-compiler]        4.0.2-7    The GNU C++ compiler
ii  g++-4.1 [c++-compiler]        4.1.2-16   The GNU C++ compiler
ii  g++-4.2 [c++-compiler]        4.2.1-5    The GNU C++ compiler

-- no debconf information

Kumar Appaiah,
458, Jamuna Hostel,
Indian Institute of Technology Madras,
Chennai - 600 036
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