[Zope] zope & PIL

hi there, we are trying to do some image manipulations with the python imaging library; i want to use an external method to call different pil functions: import Image def manipulations(infile, outfile,...) manfile = Image.open(infile) ... called locally from the python interpreter, everything is fine; called via zope (independently of doing it via forms or directly) it gives me an io error: Error type: IOError Error value: cannot identify image file any suggestions? - thank you! - oliver -- This is Linux Country. On a quiet night, you can hear Windows reboot.