[Zope] Problems with <dtml-tree>

[Ian Clarke]

Hi, I have been trying to create a site making use of the dtml-tree
tag.  To get started I tried to follow the "Inplementing a navigation
tree" section of the Zbook tutorials.  I entered everything more or less
exactly as was printed (I made some changes to the HTML output). 
Everything seems to display correctly when I initially view the page (a
tree of my "Outline" folder is displayed), however whenever I click on
any of the sub-folders I get the error to be found at the end of this
email.

Can anyone give me a pointer as to what is going wrong?

Also, on a general point - is there any effort being made to make the
error reporting system more newbie friendly?

Ian.

Traceback (innermost last):
    File /home/zope/Zope/lib/python/ZPublisher/Publish.py, line 214, in
publish_module
    File /home/zope/Zope/lib/python/ZPublisher/Publish.py, line 179, in
publish
    File /home/zope/Zope/lib/python/Zope/__init__.py, line 201, in
zpublisher_exception_hook
      (Object: ElementWithAttributes)
    File /home/zope/Zope/lib/python/ZPublisher/Publish.py, line 165, in
publish
    File /home/zope/Zope/lib/python/ZPublisher/mapply.py, line 160, in
mapply
      (Object: main)
    File /home/zope/Zope/lib/python/ZPublisher/Publish.py, line 102, in
call_object
      (Object: main)
    File /home/zope/Zope/lib/python/OFS/DTMLDocument.py, line 166, in
__call__
      (Object: main)
    File /home/zope/Zope/lib/python/DocumentTemplate/DT_String.py, line
502, in __call__
      (Object: main)
    File /home/zope/Zope/lib/python/OFS/DTMLMethod.py, line 141, in
__call__
      (Object: standard_html_header)
    File /home/zope/Zope/lib/python/DocumentTemplate/DT_String.py, line
502, in __call__
      (Object: standard_html_header)
    File /home/zope/Zope/lib/python/OFS/DTMLDocument.py, line 162, in
__call__
      (Object: ll_menu)
    File /home/zope/Zope/lib/python/DocumentTemplate/DT_String.py, line
502, in __call__
      (Object: ll_menu)
    File /home/zope/Zope/lib/python/TreeDisplay/TreeTag.py, line 151, in
render
      (Object: Outline)
  AttributeError: __call__

--
Ian Clarke                        Email: I.Clarke@strs.co.uk
Homepage: http://www.gnu.demon.co.uk/
Also see: http://freenet.on.openprojects.net/
"All we see and all we seem is but a dream within a dream"