Re: DBPITR and ORA-16005 Error: database requires recovery.

> Where have you read you can open the database in READONLY mode without
> any resetlogs in this situation?

Oracle=AE Database Backup and Recovery Basics:
http://download.oracle.com/docs/cd/B19306_01/backup.102/b14192/toc.htm

Sections 7.6.4 and 7.6.5.

 7.6.4 Database Point-in-Time Recovery Within the Current Incarnation.

"If the operation completes without errors, then your DBPITR has
succeeded. You can open the database read-only and perform queries as
needed to ensure that the effects of the logical corruption have been
reversed. If not, you may have chosen the wrong target SCN."

7.6.5 Options After Database Point-in-Time Recovery.

"After a successful DBPITR, your choices are:

    *  Ex****t one or more objects from your database using an Oracle
ex****t utility such as Data Pump Ex****t. You can then recover the
database to the current point in time and re-im****t the ex****ted
objects, as a way to return these objects to their state prior to the
unwanted change without abandoning all other changes.
    *   Open your database for read-write, abandoning all changes
after the target SCN. In such a case, you must open the database with
the RESETLOGS option, as shown here:
      RMAN> ALTER DATABASE OPEN RESETLOGS; "