In V12, the textual search, the search in the link database and the geometric search have been further developed. New indexes are necessary for this. After the changeover to V12, these would have to be created again. For this purpose, PARTadmin can be used to create the indexes manually. Or you can let the AppServer do the conversion. For this purpose there is a background task in the AppServer with the name UpgradeIndexTask. This is already preconfigured in the PARTsolutions Enterprise ISO.