This article supplements an earlier article, posted a couple of weeks ago (, on issues concerning the use of XPaths to map between the hierarchical data structure of an XML document and the relational view of ‘facts’ in the Microsoft Business Rules Engine.   As I suggested in the introduction to that article, I have repeatedly been asked to troubleshoot MS BRE issues which turn out to be related to the use of XPaths.   Earlier this week, I received another request for help.   The symptoms and solution to the problem are worth recording because they provide greater insight into this topic.