I have a Zope that is being used for content development. Much of the content is maintained in the local file system (e.g. CVS, temporary files, and the like). Some of the operations can take a bit of time. And I have a number of folks banging on the system at the same time. Much of the heavy lifiting is done by python external methods and calls to systems programs through the os.system() method. It all works swimmingly but for a couple of instances of anomolous behavior--the wrong file getting written, for example. It could be a program error, but I don't think so. I'm wondering if I am running afoul of some persistance or threading problem. (And to make things suitably complex, this is all running on a dual processor machine.) Any thoughts? -d