SQL & PL/SQL

Hi expert,

I have a problem with a custom procedure

create or replace
PROCEDURE        PRC_PARTITION
AS
	STRFLUSSO	VARCHAR2(50) := 'PRC_PARTITION';
	STRERR		VARCHAR2(255);
	V_PARTITION	VARCHAR2(255);
  V_PARTITION_TRANSACTION VARCHAR2(255);

CURSOR V_CUR (V_PARTITION_CUR VARCHAR2)
  IS
	SELECT NAME FROM CITY PARTITION (V_PARTITION_CUR);

BEGIN
  SELECT max(partition_name) into V_PARTITION FROM user_tab_partitions WHERE table_name = 'CITY';
  
  DBMS_OUTPUT.Put_Line (V_PARTITION);
  FOR I IN V_CUR(V_PARTITION)
    LOOP
    EXIT WHEN V_CUR%NOTFOUND; 
        DBMS_OUTPUT.Put_Line (I.NAME);
    END LOOP;

EXCEPTION
    WHEN OTHERS THEN
        STRERR := SUBSTR (SQLERRM, 1, 254);
        dbms_output.put_line('Errore:'||STRERR);       
        rollback;
END PRC_CARING_TRANSACTION;
/


Connecting to the database DBTEST.
SYS_P6209
Errore:ORA-02149: Specified partition does not exist
Process exited.
Disconnecting from the database DBTEST.

But the partition SYS_P6209 exists and I can run this:

SELECT NAME FROM CITY PARTITION (SYS_P6209);

.... what I wrong

cheers,
Lain