This is general error getting from Oracle 10g database. It calls as ORA-01045 that lacking of create session privilege.
Reason of ORA-01045:
From Oracle 10g, connect role doesn’t contain create session privilege.
Solution of ORA-01045:
If you granted connect role to any user and database was upgraded then you should need to give create session privilege explicitly.
Sometimes we are getting this same ORA-01045 during datapump usage. The same solution is applying to the same condition also.
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Dbametrix Remote dba expert team.