PL/SQL function not showing DMBS_OUTPUT.PUT_LINE result

Question

I have compiled a function and when I call it, the DMBS value is not shown.
I have set serveroutput on
I am using 9i.
The function completes and provides a result:
SQL> select textrawio.HEXTONUM('0D') from dual;
TEXTRAWIO.HEXTONUM('0D')
13
The script:
CREATE OR REPLACE PACKAGE BODY textrawio
AS
  FUNCTION hextonum(v_hex VARCHAR2) RETURN NUMBER
  IS
    hex          VARCHAR2(4);
    num          NUMBER;
    num1         NUMBER;
    num2         NUMBER;
  BEGIN
dbms_output.put_line ('hello');
    hex := SUBSTRB(v_hex,1,1);
    IF ( hex >= '0' and hex <= '9' ) THEN
      num1  := TO_NUMBER(hex);
    END IF;
    IF hex = 'A' TH...Any ideas from this snippet?
I have never had a prob with DBMS_OUTPUT previously.
There is no DMBS_OUTPUT_GET_LINE code.

Answer 1

The full PL/SQL is
CREATE OR REPLACE PACKAGE TEXTRAWIO
  IS
  FUNCTION tidblobchar(v_object_id char) RETURN VARCHAR2;
END; -- Package Specification TEXTRAWIO
SET SERVEROUTPUT ON
CREATE OR REPLACE PACKAGE BODY textrawio
AS
  FUNCTION tidblobchar(v_object_id char) RETURN VARCHAR2
  -- This function converts the long raw column of TIDBLOB to
  -- its character representation for manipulation.
  -- It can only be called for an object type of T.
  IS
    raw_data          LONG RAW;
    rawlen            NUMBER;
    hex_data          VARCHAR2(32760);
    char_data         VARCHAR2(32760);
    loop_counter      NUMBER;
  BEGIN
    -- Get the blob using the rowid passed in.
    -- Will always retrun only one row.
dbms_output.put_line ('1');
    SELECT data
      INTO raw_data
      FROM ifsapp.client_profile_load
     WHERE v_object_id = rowid;
dbms_output.put_line ('2');
    -- Convert the raw data to hex.   
    hex_data := rawtohex(raw_data);
    rawlen := length(hex_data);
    loop_counter := 1;
dbms_output.put_line ('3');
    -- Loop through and convert the hex to characters.
    WHILE loop_counter <= rawlen LOOP
        char_data := char_data || CHR(to_number(SUBSTRB(hex_data,loop_counter,2),'xx'));
        loop_counter := loop_counter + 2;
    END LOOP;
    RETURN char_data;
  END;
END;
/Both parts compile but when I run it:
SQL> select
  2  user_name, profile_name, data_length, textrawio.tidblobchar(rowid) data, timestamp
  3  from ifsapp.client_profile_load
  4  where data is not null
  5  ;
user_name, profile_name, data_length, textrawio.tidblobchar(rowid) data, timestamp
ERROR at line 2:
ORA-06502: PL/SQL: numeric or value error
ORA-06512: at "IFSAPP.TEXTRAWIO", line 18I was hoping to use DBMS_OUTPUT to find which is the actual line having the error and later, what values it was dealing with.
Thanks