Hello, I tried posting this to the zope list, but then thought it might be more appropriat here. I'm getting grief from an external python, method and I'm hoping that someone has some ideas that might help. Here's what I'm doing. I have a Zope product (SmartDTML) consisting of a Zclass which inherrits a DTML Document. I've heavily modified the constructor DTML Method, and among other things it calls some external python code which takes an uploaded file, converts it, and then preloads it into the DTML document via the munge() method. (I've included the code below) The external python code can be run from two places. 1. it runs automatically when you add a new instance of SmartDTML. and 2. from the Upload tab of the newly created SmartDTML instance . Well when called from the object's constructor, my external code runs and works just fine. But when called from the Upload tab, I keep getting "read-only character buffer, instance" errors out of zope. I have an indistinct feeling that it might have something to do with permissions but I don't know enough about Zope yet to know whether or not that is a valid hunch. Incidentally, this product I'm working on is a supposed to be a modified DTML Document which knows how to convert MSWord documents to HTML automatically. Here's the offending python code: #upload_file is an object property containing the uploaded file if available, #convert is a text field indicating whether or not DOC->HTML conversion should be done or not def convertFile(self): import os """Converts MSWord Documents to HTML""" if self.convert == 'YES' and self.upload_file != '': #convert upload_file to HTML f=open('./Extensions/tempfile.doc', 'w') #creat a temp file testvar = self.upload_file f.write(testvar) f.close() #convert it os.system('wvHtml ./Extensions/tempfile.doc > ./Extensions/tempfile.html') f=open('./Extensions/tempfile.html', 'r') testvar = f.read() self.munge(testvar) f.close() os.remove('./Extensions/tempfile.doc') #clean up after ourselves os.remove('./Extensions/tempfile.html') else: #no conversion if self.upload_file == '': #no upload_file so give it a standard header & footer testvar = "<dtml-var standard_html_header>\n\ <h2><dtml-var title_or_id></h2>\n<p>\nThis is the <dtml-var id> Document.\n\ </p>\n<dtml-var standard_dtml_footer>" else: #already html, no conversion needed testvar = self.upload_file self.munge(testvar) IMPORTANT NOTICE: If you are not using HushMail, this message could have been read easily by the many people who have access to your open personal email messages. Get your FREE, totally secure email address at http://www.hushmail.com.