Database Persistence Layer Error in CSchemaMap::CreateClassMaps at 5/17/2007 12:04:40 AM
[2.5.105] A class was specified for which the database persistence layer has no knowledge (class id = 20671).
[2.5.2] A fatal error occurred in the persistence layer.
Check the properties of the .dll files within the collection server's \bin directory. If they are out of date then you can copy the .dll files in question from a working collection server or uninstall the collection server removing the collection server directory and reinstall.