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[igraph] igraph Python: ImportError: DLL load failed

From: Sall, Kenneth B.
Subject: [igraph] igraph Python: ImportError: DLL load failed
Date: Mon, 11 Feb 2008 15:43:41 -0500



I’m new to Python and igraph so sorry if this is a FAQ.


I installed Python 2.5.1 (Windows: http://www.python.org/ftp/python/2.5.1/python-2.5.1.msi), rebooted, and then installed “igraph” from the igraph-0.4.5.win32-py2.5.exe installer.


When I tried the test mentioned in one of the archived emails of this list, I get this error:


Python 2.5.1 (r251:54863, Apr 18 2007, 08:51:08) [MSC v.1310 32 bit (Intel)] on


Type "help", "copyright", "credits" or "license" for more information.

>>> from igraph.test import test

Traceback (most recent call last):

  File "<stdin>", line 1, in <module>

  File "C:\Python25\Lib\site-packages\igraph\__init__.py", line 29, in <module>

    from core import *

ImportError: DLL load failed: The specified module could not be found.


I also get a Windows alert message about libxml2.dll not found, suggesting I reinstall to fix it. I tried that to no avail. Anyone know what I’m missing?


Thanks in advance.


Kenneth B. Sall

XML Data and Systems Analyst
Advanced Concepts and Integrated Systems (ACIS)
Science Applications International Corp. (SAIC)
7125 Columbia Gateway Dr., Suite 250
Columbia, MD  21046
410-953-7016 (office)

410-300-2997 (mobile)


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