[SciPy-user] signal.iirdesign throws a TypeError on Win32, any idea why, or what I'm doing wrong ?

[John A Ferguson]

My Setup is binary installs as follows onto Win2K SP3:
  Python-2.2.2.exe
  win32all-148.exe
  wxPythonWIN32-2.3.3.1-Py22.exe
  Numeric-22.0.win32-py2.2.exe
  SciPy-0.2.0_alpha_145.4398.win32-py2.2.exe

Python 2.2.2 (#37, Oct 14 2002, 17:02:34) [MSC 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> from scipy import signal
>>> signal.iirdesign(0.2, 0.3, 3, 40)
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "C:\Python22\Lib\site-packages\scipy\signal\filter_design.py", line
378,
in iirdesign
    return iirfilter(N, Wn, rp=gpass, rs=gstop, analog=analog, btype=btype,
ftyp
e=ftype, output=output)
  File "C:\Python22\Lib\site-packages\scipy\signal\filter_design.py", line
448,
in iirfilter
    z, p, k = typefunc(N, rp, rs)
  File "C:\Python22\Lib\site-packages\scipy\signal\filter_design.py", line
1052,
 in ellipap
    disp=0)
  File "C:\Python22\Lib\site-packages\scipy\optimize\optimize.py", line 145,
in
fmin
    fsim[0] = apply(func,(x0,)+args)
  File "C:\Python22\Lib\site-packages\scipy\signal\filter_design.py", line
1016,
 in kratio
    k = special.ellipk([m,1-m])
TypeError: bad argument type for built-in operation
>>>