Hi All,   During an SMS 2003 to System Center COnfiguration Manager 2007 upgrade recently I ran into the same issue described here: http://social.technet.microsoft.com/Forums/en-US/configmgrsetup/thread/0d15a643-99e1-4b5f-9060-810fd89c68f4 After some investigation this seems to be “normal”. There seems to be an issue where the mplist procedure reports an error if the capabilities field for a site is empty in the database. There are several things you can do to see whether this is the issue that...(read more)

Read the complete post at http://scug.be/blogs/sccm/archive/2009/09/08/sms-to-configmgr-2007-secondary-child-site-upgrade-amp-mplist-issue.aspx