Dieter, I get the following error at startup (Zope 2.7.6-final, Python 2.3.4, ZopeProfiler 1.1 in a multi-headed Zope/ZEO configuration with shared session variables. My hypothesis is that the culprit is the ZopeProfiler and that I need to move to Version 1.4. Are there any problems using it in a Zope/ZEO environment? --- Unhandled exception in thread started by <class ZServer.PubCore.ZServerPublisher.ZServerPublisher at 0x40467d1c> Traceback (most recent call last): File "/usr/local/src/zope/Zope2.7/lib/python/ZServer/PubCore/ZServerPublisher.py", line 23, in __init__ response=response) File "/opt2/zope/zproducts/standard/ZopeProfiler/MonkeyPatcher.py", line 35, in __call__ return self._function(*args,**kw) File "/opt2/zope/zproducts/standard/ZopeProfiler/ZopeProfiler.py", line 335, in _profilePublishModule _hookApplicationManager() File "/opt2/zope/zproducts/standard/ZopeProfiler/ZopeProfiler.py", line 383, in _hookApplicationManager R._p_jar.close() File "/usr/local/src/zope/Zope2.7/lib/python/Products/ZODBMountPoint/Mount.py", line 210, in close self._real_close() File "/usr/local/src/zope/Zope2.7/lib/python/ZODB/Connection.py", line 306, in close raise ConnectionStateError("Cannot close a connection joined to " ZODB.POSException.ConnectionStateError: Cannot close a connection joined to a transaction