INVALID CURSOR - block anonymous component the cursor in function

I get an error when you try to call my cursor.
CREATE OR REPLACE PACKAGE tax_update
AS
 TYPE gencur IS ref cursor;
 FUNCTION tax_sf
 (
   p_state IN bb_tax.state%type,
   p_thecursor IN OUT gencur
 )
 RETURN NUMBER;
END;
/ 
CREATE OR REPLACE PACKAGE BODY tax_update
AS
 FUNCTION tax_sf
 (
   p_state IN bb_tax.state%type,
   p_thecursor IN OUT gencur
 )
 RETURN NUMBER
  IS
  lv_taxrate NUMBER;
 BEGIN
  OPEN p_thecursor FOR 
   SELECT taxrate 
   FROM bb_tax
   WHERE state = p_state;
  RETURN lv_taxrate;
 END;
END;
/ 
DECLARE
  tax_cur tax_update.gencur;
  rec_tax bb_tax%rowtype;
 BEGIN
 LOOP
  FETCH tax_cur INTO rec_tax;
   EXIT WHEN tax_cur%NOTFOUND;
    DBMS_OUTPUT.PUT_LINE(rec_tax.taxrate);
 END LOOP;
END;
DECLARE
*
ERROR at line 1:
ORA-01001: invalid cursor
ORA-06512: at line 6
Mission is to create a package that will contain the rate of taxation by the State in a packed slider. The package contains a function that can receive a State of 2 character abbreviated as an argument and finds a match in the cursor and return the tax rates for tha tstate. An anonymous block will test the function with the State of North Carolina.
If anyone can help?

user13842802 wrote:
Have tried a few ways to call but always error on TAX_SF.

SET SERVEROUTPUT ON
DECLARE
    tax_cur tax_update.gencur;
    rec_tax bb_tax%rowtype;
BEGIN
    tax_cur := tax_update.tax_sf('NC');
    LOOP
      FETCH tax_cur INTO rec_tax;
      EXIT WHEN tax_cur%NOTFOUND;
      DBMS_OUTPUT.PUT_LINE(rec_tax.taxrate);
    END LOOP;
END;
/

SY.

Tags: Database

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