Hi all, I've been learning Zope for a while but I'm now so completely stuck that I thought it would be a good time to join the mailing list :-) My platform is Debian GNU/Linux unstable x86 running the 2.4.9 kernel. w/Zope 2.3.3 (source release, python 1.5.2, linux2) Running a particular External Method (clicking on the DTML Document and then clicking the View tab) leads to Zope locking up and the computer system going very sluggish. A reboot fixes everything. I can rewrite the script so it runs separately from the command line. However once it is called as an external method it misbehaves. The specifics: I execute this DTML Document: <dtml-var "Doc2PDF(Karl_Le_Quesne)"> (Karl_Le_Quesne is the id of the Word Document in the Zope Database. For some reason I need to remove the .doc extension. It seems that objects can't have a full stop in them?) Which calls this External Method: def Doc2PDF(self, inputdoc): import os import tempfile import sys import random import StringIO #For some reason this stopped working below #And now returns "None" #temp_path=tempfile.tempdir temp_path='/var/tmp' random_dir=str(random.randrange(100000000,999999999)) full_dir=temp_path+'/'+random_dir os.chdir(temp_path) os.mkdir(random_dir) os.chdir(full_dir) #Put the file onto the hard disk thefile=open('aaa123','w') thefile.write(inputdoc.data) thefile.close # Run wvPDF on the document os.system('wvPDF aaa123 aaa123.pdf') return aaa123 is a word document. Can anyone see what has gone wrong? Note that the External Method properties are id = Module Name = Function Name = Doc2PDF Before the external command wvPDF is run I can confirm that the word document (named aaa123) is sitting in the directory /var/tmp/xxxxxxxxx/. I can manually run wvPDF as user www-data. Many thanks, Adam