Okay, firstly, I notice dtml-tree doesn't support the standard abbreviation: <dtml-TAG "x"> -> <dtml-TAG expr="x"> As the following: <dtml-tree "_.getitem('sequence-item',0)" branches="postingValues"> gives me: Error Type: KeyError Error Value: "_.getitem('sequence-item',0)" nice... Now the one that has me stumped :( Why does the following: <dtml-tree expr="_.getitem('sequence-item',0)" branches="postingValues"> Give me: Error Type: NameError Error Value: _ This is all in 2.1.6... cheers, Chris PS: The traceback for the last one: Traceback (innermost last): File E:\Zope\2179E4~1.6\lib\python\ZPublisher\Publish.py, line 214, in publish_module File E:\Zope\2179E4~1.6\lib\python\ZPublisher\Publish.py, line 179, in publish File E:\Zope\2179E4~1.6\lib\python\Zope\__init__.py, line 202, in zpublisher_exception_hook (Object: ElementWithAttributes) File E:\Zope\2179E4~1.6\lib\python\ZPublisher\Publish.py, line 165, in publish File E:\Zope\2179E4~1.6\lib\python\ZPublisher\mapply.py, line 160, in mapply (Object: manage_postings) File E:\Zope\2179E4~1.6\lib\python\ZPublisher\Publish.py, line 102, in call_object (Object: manage_postings) File E:\Zope\2179E4~1.6\lib\python\App\special_dtml.py, line 120, in __call__ (Object: manage_postings) (Info: E:\Zope\2.1.6\lib\python\Products\Squishdot/Squishdot_manage_postings.dtml) File E:\Zope\2179E4~1.6\lib\python\DocumentTemplate\DT_String.py, line 502, in __call__ (Object: manage_postings) File E:\Zope\2179E4~1.6\lib\python\DocumentTemplate\DT_In.py, line 691, in renderwob (Object: postingValues) File E:\Zope\2179E4~1.6\lib\python\TreeDisplay\TreeTag.py, line 152, in render (Object: a tree tag) File E:\Zope\2179E4~1.6\lib\python\DocumentTemplate\VSEval.py, line 208, in eval (Object: _.getitem('sequence-item',0)) File <string>, line 0, in ? NameError: (see above)