[Zope] How can I find memory leaks in External Methods?

I have an External method that is used to upload files to a unix file system. Thing is, it seems to be causing more and more memory to be used by Zope. Can anyone give me some pointers on what might be causing this? TIA Tone ------ Dr Tony McDonald, FMCC, Networked Learning Environments Project http://nle.ncl.ac.uk/ The Medical School, Newcastle University Tel: +44 191 222 5116 Fingerprint: 3450 876D FA41 B926 D3DD F8C3 F2D0 C3B9 8B38 18A2