Oracle Solution for Error ora-16007

ORA-16007: invalid backup control file checkpoint

What triggered the Error:

The backup control file being opened for read-only access does not contain a valid control file checkpoint. Therefore the database cannot be opened for read-only access.

What should we do to fix it:

First open the database for read-write access which will result in valid control file checkpoint. Then re-open the database for read-only access.