ORA-19905:log_archive_format must contain %s, %t and %r Cause: log_archive_format is missing a mandatory formatelement. Starting with
Oracle 10i, archived log file names must contain each of the elements
%s(sequence), %t(thread), and %r(RESETLOGS ID) to ensure that all archived log
file names are unique. Action: Addthe missing format elements to log_archive_format.