[Zope] logging inside TTW script

Hi, How can I log events that take place inside a TTW Python Script, and log them immediately? I have a script that converts a few hundreds of objects in a "for" loop. One of these objects causes my script to fail. I need to find out which object it is. In other words, which iteration. TTW scripts of course runs is a single transaction for Zope, and if anything fails, Zope will discard the whole transaction and not tell me which iteration the problem was in. If I put logging in the TTW script, it will not help, because the logging itself will be discarded too! Please help. -- Milos Prudek