Summary: Hi, I'm a newbie Zope developer. I'm trying to use a fairly simple class from the Python interpreter (see below). It's not working (specific error message listed below). I've traced the problem to ExtensionClass. I'm not sure that I'm correct about that and I'm really looking for any help you might offer. Thanks, // Mark Details: Running Zope 2.3.3 as a service on Windows 2000 Using PythonWin ActivePython Build 210 Environment variables: PYTHONPATH=C:\Program Files\ZopeWebSite\lib\python (That's the /lib/python folder in the Zope installation.) When I try to import this class into PythonWin: import ZODB from Persistence import Persistent class Queue(Persistent): def __init__(self): self.list=[] def put(self, obj): self.list=self.list + [obj] def get(self): obj=self.list[-1] self.list=self.list[0:-1] return obj I get this error: File "c:\python21\pythonwin\pywin\framework\scriptutils.py", line 394, in ImportFile exec codeObj in __main__.__dict__ File "<auto import>", line 1, in ? File "queue.py", line 1, in ? import ZODB File "c:\program files\zopewebsite\lib\python\ZODB\__init__.py", line 85, in ? import sys, ExtensionClass, TimeStamp, cPersistence, Persistence ImportError: DLL load failed: The specified module could not be found. If I simply try to import ExtensionClass all by itself interactively: import ExtensionClass I get this error: File "<interactive input>", line 1, in ? ImportError: DLL load failed: The specified module could not be found.