Prepupgradecheck tool reported the issue: The following feature(s) are referenced by the content, but they are not installed on the web server.
- Name = Unknown, Feature id = 657b219d-2cf6-4e97-b6d2-fdcda01afde6, Reference count = 9, Scope = Web, Status = Missing
Well, this occurs when you have faulty feature in the SharePoint environment.
Here are the best tools/techniques in my experience to solve this issue:
This will be our primary analysis and reporting tool providing us with invaluable information regarding your SharePoint 2007 farm and actions that may be required to be taken prior to upgrading to SharePoint 2010. It is good to have October CU:http://support.microsoft.com/kb/976730/ where the preupgradecheck is enhanced further.
Feature Admin Tool:
You can Find and delete faulty feature from the farm using Feature Admin Tool. This is a very handy tool,make sure you test before you remove these faulty features. Removing these features should fix most of the errors on the pre-upgrade check.
WSS Analyze Features
Verifies if the feature definition files for all installed features are present on the file system. Also allows to verify if the features used in site collections an sites are installed on the server.
WssAnalyzeFeatures -url http://server:port
This command will verify all features on the server and in the site collection.
Wss Remove Feature From Site
Some times, STSADM.EXE -o deactivatefeature may fail. his tool allows to remove the feature from the site or site collection completly.
WssRemoveFeatureFromSite -scope (site|sitecollection) -url <url-to-site> -featureid <featureid> -force
You can use SharePoint Manager from Codeplex.
Extended Migration Report:
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SharePoint Usage Reports
Usage reports, collaboration and audit for SharePoint.
Document SharePoint Farm
Automatically generate SharePoint documentation.