A special case occurs when RECOVER CATALOG USING REPLICATION is used for a reset, and a CAT-REC file is specified which is as old or younger than the replication but older than the current version of the original. The original is not reset exactly to the state the catalog had when the CAT-REC copy was created, but one more CAT-LOG record will be applied. In this way it is possible to get closer to or even achieve the current state with the last CAT-REC copy if the CAT-REC file of the original is defective.
Example
A CAT-REC file is created and the new, already changed CAT-LOG file is entered. REFRESH REPLICATION takes account of this fact and does not evaluate this last entry since this file normally represents the current and therefore open CAT-LOG file.
However, if you specify this CAT-REC copy for RECOVER USING REPLICATION then this last entry is evaluated which, in this case, means that to all the entries, which have been logged in this CAT-LOG file and the DA-LOGS contained in it, the modifications are applied. If the CAT-LOG has not been changed, to anything the modifications are applied. If the CAT-LOG has been changed, the applying of the modifications ends at the point where the change occurred.