*To flash back a table to an earlier SCN or timestamp, you must have either the FLASHBACK object privilege on the table or the FLASHBACK ANY TABLE system privilege.
* From question:the OCP user has been granted the FLASHBACK ANY TABLE system privilege. *Syntax
flashback_table::=

Description of flashback_table.gif follows

To back up tablespaces or data files:
Start RMAN and connect to a target database and a recovery catalog (if used).
If the database instance is not started, then either mount or open the database.
Run the BACKUP TABLESPACE command or BACKUP DATAFILE command at the RMAN
prompt.

Explanation/Reference:
Explanation:
Interesting behavior in 12.1.0.1 DB of creating an undo tablespace in a PDB. With the new Multitenant architecture the undo tablespace resides at the CDB level and PDBs all share the same UNDO tablespace.
When the current container is a PDB, an attempt to create an undo tablespace fails without returning an error.

*Data Recovery Advisor can diagnose failures such as the following:
/ (B)Components such as datafiles and control files that are not accessible because they do not exist, do not have the correct access permissions, have been taken offline, and so on
/ (A, E)Physical corruptions such as block checksum failures and invalid block header field values
/Inconsistencies such as a datafile that is older than other database files
/I/O failures such as hardware errors, operating system driver failures, and exceeding operating system resource limits (for example, the number of open files)
*The Data Recovery Advisor automatically diagnoses corruption or loss of persistent data on disk, determines the appropriate repair options, and executes repairs at the user's request.
This reduces the complexity of recovery process, thereby reducing the Mean Time To Recover (MTTR).