The IndexManager of V12 is using a new JavaLucene index, which is activated under $CADENAS_SETUP/partsol.cfg in the following key:

[INDEX:LUCENE]
JavaLucene=1

Even if there is a complete V11 index, for V12, the Full-text index has to be completely regenerated (compare above figure 0%). Furthermore also the LinkDB index has to be regenerated, because it also uses the new index type. The Geo index is correctly displayed immediately, however, it should also be regenerated, because there are new algorithms which will improve the search options.

The figure shows the situation with the (missing) new index after freshly installed V12. Only for "ANSI / ASME", "commonpool" and "Assistent" catalog, the new index has already been created.