Error(120,9): PLS-00363:

Question

hello guys,
i am facing an error about passing an out* parameter in procedure call.
the error is:
Error(120,9): PLS-00363: expression '<expression>' cannot be used as an assignment target
and the code is :
create or replace
PROCEDURE usp_abc
v_pct in number  ,   
v_pVt in number  ,
vr_payagainst ,
vr_Todate
as
begin
usp_xyz (
        v_pTrantype=>vr_payagainst,
        v_pTrandate=>vr_Todate,
        v_pcd=>v_pct,
        v_pVd=>v_pVt,  
        *v_pLedgerID=>null*,-----------------> the  line generating error
end;the parameter v_pLedgerID in procedure usp_xyz has been defined as
v_pLedgerID OUT NUMBER
could anyone help me in fixing that bug..
thank you very much

Answer 1

Did you look up the error message in the documentation?
PLS-00363: expression 'string' cannot be used as an assignment targetCause: A literal, constant, IN parameter, loop counter, or function call was mistakenly used as the target of an assignment. For example, the following statement is illegal because the assignment target, 30, is a literal: SELECT deptno INTO 30 FROM dept WHERE ... -- illegal
Action: Correct the statement by using a valid assignment target.>
If v_pLedgerID has been defined as an OUT parameter you can't assign a value to it when you call the procedure. Here is a simple example demonstrating this:
SQL > DECLARE
  2          PROCEDURE test ( v_var OUT number)
  3          AS
  4          BEGIN
  5                  DBMS_OUTPUT.PUT_LINE(v_var);
  6          END;
  7  BEGIN
  8          test(v_var => 30);
  9  END;
10  /
        test(v_var => 30);
ERROR at line 8:
ORA-06550: line 8, column 14:
PLS-00363: expression '30' cannot be used as an assignment target
ORA-06550: line 8, column 9:
PL/SQL: Statement ignored