ORA-01307

Error: ORA-01307: no LogMiner session is currently active

Causa: 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()

Acción: Invoke the DBMS_LOGMNR.START_LOGMNR() procedure before issuing a select from the V$LOGMNR_CONTENTS view.