ORA-01307: no LogMiner session is currently active Cause: A select was issued from v$logmnr_contents without first invoking the
dbms_logmnr.start_logmnr() procedure. Otherwise, dbms_logmnr.end_logmnr()
was called without a prior call to dbms_logmnr.start_logmnr() or dbms_
logmnr.add_logfile() Action: Invoke the dbms_logmnr.start_logmnr() procedure before issuing a select
from the v$logmnr_contents view.