"Switchover to logical standby requires a log archive destination"
*Cause: A valid log archive destination was not found to which the local
system could archive the end of redo (EOR) log file. A minimum of
one destination is required.
*Action: Ensure all log archive destinations are properly configured and,
if applicable, have network connectivity before reissuing the
ALTER DATABASE COMMIT TO SWITCHOVER TO LOGICAL STANDBY DDL