Restore a recent backup of the catalog file.
Danke für die Antwort. Wie mache ich das?
I would modify thoes instructions slightly. When you COPY the backup catalog, don't put it in the original folder, put it in a brand new empty folder (just in case that folder where the original catalog was located was on a bad sector on your hard disk)
danke für den Tipp. Ich werde ihn beherzigen.