I posted this before but didn't get a reply.

Has any one seen this bug, Or do they know a fix?

ATM this is stopping me using 2.3.1b2 which is a bad thing(tm)

-----------
Zope Errorr

Zope has encountered an error while publishing this resource.

Error Type: TypeError
Error Value: len() of unsized object

With this traceback:
Traceback (innermost last):
  File
/usr/local/src/Zope-2.3.1b2-linux2-x86/lib/python/ZPublisher/Publish.py,
line 223, in publish_module
  File
/usr/local/src/Zope-2.3.1b2-linux2-x86/lib/python/ZPublisher/Publish.py,
line 187, in publish
  File
/usr/local/src/Zope-2.3.1b2-linux2-x86/lib/python/Zope/__init__.py,
line 221, in zpublisher_exception_hook
    (Object: Traversable)
  File
/usr/local/src/Zope-2.3.1b2-linux2-x86/lib/python/ZPublisher/Publish.py,
line 171, in publish
  File
/usr/local/src/Zope-2.3.1b2-linux2-x86/lib/python/ZPublisher/mapply.py,
line
160, in mapply
    (Object: executeSearch)
  File
/usr/local/src/Zope-2.3.1b2-linux2-x86/lib/python/ZPublisher/Publish.py,
line 112, in call_object
    (Object: executeSearch)
  File 
/usr/local/src/Zope-2.3.1b2-linux2-x86/lib/python/OFS/DTMLMethod.py,
line 189, in __call__
    (Object: executeSearch)
  File
/usr/local/src/Zope-2.3.1b2-linux2-x86/lib/python/DocumentTemplate/DT_String.py,
line 538, in __call__
    (Object: executeSearch)
  File
/usr/local/src/Zope-2.3.1b2-linux2-x86/lib/python/DocumentTemplate/DT_Let.py,

line 146, in render
    (Object: Results="Catalog(REQUEST=REQUEST)")
  File
/usr/local/src/Zope-2.3.1b2-linux2-x86/lib/python/DocumentTemplate/DT_Util.py,
line 334, in eval
    (Object: Catalog(REQUEST=REQUEST))
    (Info: REQUEST)
  File <string>, line 0, in ?
  File
/usr/local/src/Zope-2.3.1b2-linux2-x86/lib/python/Products/ZCatalog/ZCatalog.py,
line 530, in searchResults
    (Object: Traversable)
  File

/usr/local/src/Zope-2.3.1b2-linux2-x86/lib/python/Products/ZCatalog/Catalog.py,
line 654, in searchResults
  File
/usr/local/src/Zope-2.3.1b2-linux2-x86/lib/python/Products/ZCatalog/Catalog.py,
line 591, in _indexedSearch
TypeError: (see above)
--------

Here is the line which calls the search:

sr = self.searchResults({'Type' : type, 'sort_on':'lowercase_title_'})

fyi. type = 'TypeTest'

The indexes are as follows:
Status = Text Index
Type = Field Index
Identifier = Field Index
lowercase_title_ = Field Index
parent_identifiers_ = Keyword Index

The meta types are like this:
Title
id
identifier

There are only 13 records in the catalog.
And there are some results to be returned.

Cheers
-Andy

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