EXPDP error ORA-39001: invalid argument value and ORA-01775: looping chain of synonyms After issuing expdp command the following errors were occured: ORA-39001: invalid argument value ORA-01775: looping chain of synonyms The solution is so simple in this case. You have to find the synonym which was creating problem. Issue the following command: Select owner, object_name, object_type, status from dba_objects where object_name like '%SYS_EXPORT_%'; Drop the synonym or all the synonym found in this query. drop public synonym SYS_EXPORT_SCHEMA_01; Now run the expdp command again. ======================================================= Happy to help !!!