Cause
A SELECT statement was issued from V$LOGMNR_CONTENTS without invoking the DBMS_LOGMNR.START_LOGMNR() procedure.
Action
Invoke the DBMS_LOGMNR.START_LOGMNR() procedure before issuing a SELECT statement from the V$LOGMNR_CONTENTS view.
Oracle 26ai
ORA-01306
Error Message
DBMS_LOGMNR.START_LOGMNR() must be invoked before selecting from V$LOGMNR_CONTENTS