ORA-01006: la variable attachée (bind variable) n'existe pas

Bonsoir

J'ai l'erreur suivante

Citation:

ORA-01006: la variable attachée (bind variable) n'existe pas.

Je pense que cela est du a ma variable pMonth1 dans lors de l'appel
OPEN cValuationReportMonth FOR v_SQLYEARMONTH USING pYear1,pMonth1,pVessel;

Mais pourtant pMonth1 est bien utilisé dans
MONTHS_BETWEEN (LAST_DAY(TO_DATE ('':pYear1''||'':pMonth1'', ''YYMM'')), LAST_DAY(TO_DATE(va.month, ''YYMM'')))+1 as MYEAR ?

Ou est mon erreur ?
Merci

Code:

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
 
 FUNCTION F_EXPORT_CONSO_VESSEL(pYear1 IN VARCHAR2,pMonth1 IN VARCHAR2,pVessel LO_VESSEL.VESSEL_uid%TYPE)
               RETURN CURSOR_EXPORT
IS
cValuationReportMonth   CURSOR_EXPORT;
v_SQLYEARMONTH varchar2(4000);
BEGIN
 
    ---- par Annnee  
       v_SQLYEARMONTH :='select 
          MONTHS_BETWEEN (LAST_DAY(TO_DATE ('':pYear1''||'':pMonth1'', ''YYMM'')),  LAST_DAY(TO_DATE(va.month, ''YYMM'')))+1 as MYEAR
           ,sum(NVL(va.AMOUNT_USED,0)) AS  AMOUNT_z01
           ,sum(NVL(va.QUANTITY_USED,0)) AS  QUANTITY_z01
           FROM 
           lo_vessel ve
          ,LO_VALUATION va 
          WHERE 
          (to_char(TO_DATE(va.month, ''YYMM''), ''YY'') = :pYear1 ) 
          and va.VESSEL_UID=ve.VESSEL_UID 
          and ve.vessel_uid=:pVessel
          GROUP BY TO_DATE(va.month, ''YYMM'')
          ORDER BY TO_DATE(va.month, ''YYMM'')';
      --  la boucle par mois 
        OPEN  cValuationReportMonth FOR v_SQLYEARMONTH USING pYear1,pMonth1,pVessel;
 
RETURN cValuationReportMonth;
 
END F_EXPORT_CONSO_VESSEL;