[Zope] No profiling file written!

Hi!, I need to do some profiling with Zope, and the tool in the management console works fine, but I can't find the file where the profiling info is supposed to be written. This is what my start script says about profiling: PROFILE_PUBLISHER="/usr/local/Zope-2.6.2-linux2-x86/var/profile.log" export PROFILE_PUBLISHER But the file doesn't seem to ever come to exist! Could anybody tell me what am I missing? Thanks a lot, Toni.