[Zope] ZCatalog reindexing fails

[Lars H. Korte]

Hi,

I'm trying to reindex the SearchableText index in my portal_catalog.
After clicking on reindex and waiting a short time an Attribute Error
occurs saying "getUserById"

the error log has the following traceback:
---
Traceback (innermost last):
  Module ZPublisher.Publish, line 98, in publish
  Module ZPublisher.mapply, line 88, in mapply
  Module ZPublisher.Publish, line 39, in call_object
  Module Products.ZCatalog.ZCatalog, line 472, in manage_reindexIndex
  Module Products.ZCatalog.ZCatalog, line 457, in reindexIndex
  Module Products.CMFCore.CatalogTool, line 232, in catalog_object
  Module Products.ZCatalog.ZCatalog, line 500, in catalog_object
  Module Products.ZCatalog.Catalog, line 295, in catalogObject
  Module Products.ZCatalog.Catalog, line 403, in recordify
  Module Products.CMFDefault.DublinCore, line 104, in Creator
  Module AccessControl.Owned, line 87, in getOwner
AttributeError: getUserById
---

I'm using Zope 2.6.0 + CMF 1.3 + Plone1.0b2 and LDAP Authentication.

There seems to be a problem with a username I think. How can I make Zope
print (perhaps in a file) which name that is? Or could this error have
another reason?
I would appreciate any help!!

regards
Lars