after following instructions on:
http://openbabel.org/docs/2.3.0/UseTheLibrary/PythonInstall.html#windows

Receive the following error running testscript. Assistance towards
resolution would be greatly appreciated. Would appear that error is
encountered in line 119 pybel.py (part of openbabel python bindings).

c:\>c:\python25\python
Python 2.5.2 (r252:60911, Feb 21 2008, 13:11:45) [MSC v.1310 32 bit (Intel)]
on
win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import pybel
>>> mol = pybel.readstring("smi", "CC(=O)Br")
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "C:\Python25\Lib\site-packages\pybel.py", line 119, in readstring
    raise ValueError("%s is not a recognised OpenBabel format" % format)
ValueError: smi is not a recognised OpenBabel format

I uninstalled 2.5 openbabel bindings, installed 2.7 bindings, ran python2.7,
same error.

Following previous threads, uninstalled all bindings and openbabel 2.3.0,
re-installed openbabel and 2.7 bindings, same error.

Previously, users with similar errors have been requested to report details
of installation. They are included below (newline whitespaces deleted):

c:\Program Files\OpenBabel-2.3.0>babel -V
Open Babel 2.3.0 -- Nov 25 2010 -- 23:22:17

c:\Program Files\OpenBabel-2.3.0>babel -Hsdf
sdf  MDL MOL format
Reads and writes V2000 and V3000 versions
Read Options, e.g. -as
 s  determine chirality from atom parity flags
       This is valid only for 0D information. Atom
       parity is always ignored on reading for MOL files
       containing 2D or 3D information.
 T  read title only
 P  read title and properties only
       When filtering an sdf file on title or properties
       only, avoid lengthy chemical interpretation by
       using the T or P option together with copy format.
Write Options, e.g. -x3
 3  output V3000 not V2000 (used for >999 atoms/bonds)
 m  write no properties
 w  recalculate wedge and hash bonds(2D structures only)
 A  output in Alias form, e.g. Ph, if present
Specification at: http://www.mdl.com/downloads/public/ctfile/ctfile.jsp

c:\Program Files\OpenBabel-2.3.0>dir "%BABEL_DATADIR%"\mr.txt
 Volume in drive C is Windows7_OS
 Volume Serial Number is D853-7305
 Directory of C:\Program Files\OpenBabel-2.3.0\data
10/26/2010  12:37 PM             4,295 mr.txt
               1 File(s)          4,295 bytes
               0 Dir(s)  46,059,106,304 bytes free




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