However, I would not make such changes asynchronously. I would use "ZopeFind" to locate all objects that need to be updated and then do it. Maybe, its a matter of personal taste ... Dieter this is an interesting idea. another thing i might try is running the script from Xron and ZopeFinding the objects. in this way the task is completely automated and will free me from having to run it whenever new objects are added. -<mike>-