ORA-01571

Error: ORA-01571: redo version string incompatible with ORACLE version string

Causa: This software version cannot read the current redo logs, and either crash recovery is required or there are offline database files that need media recovery. If a file name is listed then it needs media recovery.

Acción: Shut down and restart using the compatible software. Do any required media recovery, and open the database. Shut down and restart using the current software. If the file is going to be dropped then take it offline with the DROP option to skip this check.