Help! This is a bug that I discovered after I had just completed a change of name for one of the packages in my app, from "common" (bad name) to "enterprise" (sounds too broad but is actually appropriate in this case). Yes, I am using t.enterprise modules (adbapi) and yes, I've made sure that all our imports of that and of our module by that name (pangalactic.enterprise :^) are fully-qualified. The traceback we're getting is: Traceback (most recent call last): File "test_pger_get.py", line 37, in ? reactor.run() # start the main loop File "/usr/lib/python2.2/site-packages/twisted/internet/default.py", line 121, in run self.startRunning(installSignalHandlers=installSignalHandlers) File "/usr/lib/python2.2/site-packages/twisted/internet/default.py", line 115, in startRunning self._handleSignals() File "/usr/lib/python2.2/site-packages/twisted/internet/default.py", line 87, in _handleSignals signal.signal(signal.SIGINT, self.sigInt) SystemError: error return without exception set -------------------------------------------------------------- This is coming from a pretty simple test script that initializes some things and does a reactor.run() and prints the result or the error. (There's too much context to include all the code in this message, but I'll send it off-list to anyone who's interested.) The platform-dependent aspect is that we have run the exact same code on Debian (unstable) have *not* seen this traceback there. We get the traceback on a Red Hat 9 (2.4.20-18.9) machine. Basically curious if anyone else has seen anything like this. (We are still in the process of trying to narrow the differences between the code that ran -- before the module name change [big time sed script job] and after ... will post if we have a breakthrough.) Thanks! Steve