ORA-19861: additional backup pieces cannot

admin

ORA-19861: additionalbackup pieces cannot be validated in this conversation
Cause: The user tried to add new pieces to the list of filesbeing validated after the
validation had already been performed. In a validation conversation, the listcan
only be validated once.
Action: Addall the backup pieces to the list before validating, or start a new
validation conversation for the remaining pieces.