ORA-06521: PL/SQL: Error mapping function while writting into a text file

Question

Hi,
I'm getting an errror ORA-06521: PL/SQL: Error mapping function while trying to write data into a text file.
I'm using the following code:
--To create a new directory
create or replace directory temp as 'C:/temp';
declare
                l_str varchar2(1000);
                output_file utl_file.file_type;
                cursor test_write_cur is
                     select EMPNO,ENAME,JOB,SAL,HIREDATE
                       from EMP
                     where DEPTNO=30;
begin
           output_file := utl_file.fopen('TEMP','TESTFILE.txt','w');
           for test_write_rec IN test_write_cur
           loop          
            l_str :=     test_write_rec.EMPNO||'^'||test_write_rec.ENAME||'^'||test_write_rec.JOB||'^'||
                     test_write_rec.HIREDATE||'^'||test_write_rec.SAL||chr(10);
            utl_file.put_line(output_file,l_str);
                 end loop;                                                                           
           utl_file.fclose(output_file);
end;Please suggest me if i'm wrong.
Thanks & Regards,
Sanket Mishra

Answer 1

Dear Sanket,
I think you are need use TO_CHAR() function
  to_char(test_write_rec.EMPNO) ,
  to_char(test_write_rec.HIREDATE,'DD.MM.YYYY')
  to_char(test_write_rec.SAL)