In MOSS 2007 to SharePoint 2010 migration, got this Preupgradecheck issue: The following web part(s) are referenced by the content, but they are not installed on the web server
Solution: Enumerate all web parts and find the missing ones. Remove the faulty web part from the referenced pages. To Enumerate all web parts, Run this STSADM command line:
stsadm.exe -o enumallwebs -includewebparts
Another utility to do the same thing:
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