To get rid of the ImportError I had to add 'import trigger' to ZEO/__init__.py I do not currently have an explanation as to why it works with 2.5.1 but stopped doing so with 2.6.0 (at least for me). Python is the very same (2.1.3, LFS enabled). Just to mention it again: ZE0 1.0, Zope 2.6.0a1 Rgds, Stefan -- BLOWFISH, n. - Preference for beef.