Erro no comando da aula

Ao executar o seguinte erro foi reportado:

BEGIN dbms_advisor.create_file(dbms_advisor.get_task_script('task1'),'tune_scripts','tune.sql'); END;
Relatório de erros -
ORA-22285: diretório ou arquivo inexistente para operação FILEOPEN
ORA-06512: em "SYS.DBMS_LOB", line 1481
ORA-06512: em "SYS.DBMS_ADVISOR", line 632
ORA-06512: em line 1
22285. 00000 -  "non-existent directory or file for %s operation"
*Cause:    Attempted to access a directory that does not exist, or attempted
           to access a file in a directory that does not exist.
*Action:   Ensure that a system object corresponding to the specified
           directory exists in the database dictionary, or
           make sure the name is correct.

Abaixo estão meus comandos:

create table tb as select * from all_objects;


select distinct object_id from tb order by object_id;

execute dbms_advisor.quick_tune(dbms_advisor.sqlaccess_advisor, 'task1','select distinct object_id from tb order by object_id');

select * from user_advisor_actions;

create directory tune_scripts as 'C:\Tempo';

EXECUTE dbms_advisor.create_file(dbms_advisor.get_task_script('task1'),'tune_scripts','tune.sql');