Hi, <loren> I have ZScheduler 0.0.6 running on a Linux machine (www.fippless.org at CodeIt Computing), so we can't say it's an NT vs. Linux problem. It's more likely a Linux/Python/Zope configuration issue. The most system-dependent part of ZScheduler is its use of Python's threading module.</loren> On my Linux machine I have installed the binary release of Zope2.1.7. Thus, I Guess it contents a multi-threading version of the Python interpreter !? <loren> I doubt whether the problem is with the archive itself, but just to be sure, I created a new archive for version 0.0.6 with a different archiving tool. The new one shows 12330 bytes while the old one shows 20480 bytes (quite a difference for the same content, eh?).</loren> I have tested your new archive but nothing have changed. FR