Thanks once again for all of your advice - and sorry for tying up so much of your time. It is very much appreciated. Having just arrived home from work, I don't have code that I could paste, and I am not entirely certain what you mean, so I'll try to explain the best I can. In dtml the dtml method calling the external method function, it is called with the 2 parameters I listed in the dtml-let previously. In the function definition in the actual python module (in the Extensions folder), the self parameter is now the first parameter listed, so: def run(self, fileID, lines) # if I remember rightly After changing this, I just clicked save changes in the ZMI screen for the External Method I don't know of anywhere else I should have defined the parameters, so hopefully that is about it. Regarding the advice on function names, thank you for that. Of course it makes perfect sense, and should be obvious to anyone with some sense! Thanks yet again Ashley From: Dylan Reinhardt <zope@dylanreinhardt.com> Reply-To: zope@dylanreinhardt.com To: Ashley Lloyd <ashleylloyd@hotmail.com> CC: zope@zope.org Subject: Re: [Zope] Newbie - passing a list to an External Method Date: 22 Apr 2003 09:12:46 -0700 On Tue, 2003-04-22 at 08:31, Ashley Lloyd wrote:

Thanks again for your help Dylan.

If I set the External Method parameters to (self, fileID, Lines)

Are you adding "self" to the parameter list of the external method object in Zope? You shouldn't be. Just make it the first parameter in the external method _code_. Don't change the external method object or the DTML code that calls it. Let's see where that gets us... Dylan PS - On a tangent, it's a really good idea to get in the habit of giving your functions specific, descriptive names (like "create_pdf()") rather than naming them after a module they import or using common terms like "run()" (a name which is used elsewhere in the language). This makes troubleshoot easier and reduces the odds that you'll accidentally encounter a namespace collision. _________________________________________________________________ Express yourself with cool emoticons http://www.msn.co.uk/messenger