Zope 2.9.X Python 2.4 Centos 4.4 Linux Firefox 2.0.0.5 (Linux and Win XP) I have a dtml method is a folder C and a folder setup / A B C scripts In the dtml method, there is a call to a script passing in a composed string made up of variables passed in through request inside of a dtml-let, <dtml-let someval="scripts.cleanfilename(cgivar1+'_'+cgivar2)" > --- methods that use someval --- </dtml-let> a pattern we have used in many places without a problem. In this particular case, Zope throws an error Traceback (most recent call last): File "/usr/local/src/zope/Zope2.9/lib/python/ZPublisher/Publish.py", line 115, in publish request, bind=1) File "/usr/local/src/zope/Zope2.9/lib/python/ZPublisher/mapply.py", line 88, in mapply if debug is not None: return debug(object,args,context) File "/usr/local/src/zope/Zope2.9/lib/python/ZPublisher/Publish.py", line 41, in call_object result=apply(object,args) # Type s<cr> to step into published object. File "/usr/local/src/zope/Zope2.9/lib/python/OFS/DTMLMethod.py", line 144, in __call__ r=apply(HTML.__call__, (self, client, REQUEST), kw) File "/usr/local/src/zope/Zope2.9/lib/python/DocumentTemplate/DT_String.py", line 476, in __call__ try: result = render_blocks(self._v_blocks, md) File "/usr/local/src/zope/Zope2.9/lib/python/DocumentTemplate/DT_In.py", line 630, in renderwob if self.elses: return render_blocks(self.elses, md) File "/usr/local/src/zope/Zope2.9/lib/python/DocumentTemplate/DT_In.py", line 703, in renderwob try: append(render(section, md)) File "/usr/local/src/zope/Zope2.9/lib/python/DocumentTemplate/DT_Let.py", line 75, in render else: d[name]=expr(md) File "/usr/local/src/zope/Zope2.9/lib/python/DocumentTemplate/DT_Util.py", line 196, in eval return eval(code, d) File "<string>", line 1, in <expression> AttributeError: cleanfilename The failing line is (literally) <dtml-let sname="scripts.cleanfilename(user_lastname+'_'+user_firstname)" which is part of a <dtml-let> with several components. Now, the failing element is part of a method that fundamentally has a if-elif structure and the actual code fragment is embedded in a pair of nested <dtml-in> blocks which have internal <try>-<except>-<else> blocks, but that is all control structure and should not impact name/attribute resolution, or so I believe. A trace through the executing method shows the control flow is functioning as expected. Security settings appear to be correct--and the correct execution of simple test methods (see below) tend to support that conclusion. Moving the script into the same folder as the method (that is, moving it from the folder scripts to the folder C in the layout above) is a workaround, but it breaks our coding conventions. i Simple test methods in folder C <dtml-var standard_html_header> <dtml-let sss="scripts.cleanfilename('able baker charlie ')"> <dtml-var sss> </dtml-let> <dtml-var standard_html_footer> work fine and do not throw the attribute error. I suspect that this is a problem caused by some trivial error, but we've been unable to find it. Any help/suggestions as to how to resolve this puzzle would be appreciated.