Bonjour, je souhaiterais Exporter les tables SYS.WRI$_OPTSTAT_BAK,SYS.WRI$_OPTSTAT_TAB_BAK,SYS.WRI$_OPTSTAT_IND_BAK

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expdp '/ as sysdba' directory=datapump dumpfile=tables.dmp content=all tables=SYS.WRI$_OPTSTAT_BAK,SYS.WRI$_OPTSTAT_TAB_BAK,SYS.WRI$_OPTSTAT_IND_BAK  logfile=tables.log reuse_dumpfiles=y
Mais j'ai le message :

Connected to: Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production
Starting "SYS"."SYS_EXPORT_TABLE_01": "/******** AS SYSDBA" directory=datapump dumpfile=datahubdbtsttables.dmp content=ALL tables=SYS.WRI$_OPTSTAT_BAK,SYS.WRI$_OPTSTAT_TAB_BAK,SYS.WRI$_OPTSTAT_IND_BAK logfile=datahubdbtsttables.log reuse_dumpfiles=y
ORA-39166: Object SYS.WRI$_OPTSTAT_BAK was not found or could not be exported or imported.
ORA-39166: Object SYS.WRI$_OPTSTAT_TAB_BAK was not found or could not be exported or imported.
ORA-39166: Object SYS.WRI$_OPTSTAT_IND_BAK was not found or could not be exported or imported.
ORA-31655: no data or metadata objects selected for job
Job "SYS"."SYS_EXPORT_TABLE_01" completed with 4 error(s) at Mon Oct 25 11:06:28 2021 elapsed 0 00:00:16

Quelqu'un aurait il une idee ?

merci