Error while runing dbms_job.isubmit

Question

i created a procedure proc1 in user scott which inserts a sequence of numbers into the table called 'ss' .
create or replace procedure proc1(a in number) is
begin
insert into ss values(seq1.nextval);
end;
Later i tried to run the dbms_job .submit from the sys user in the following way:
variable jobno number;
BEGIN
DBMS_JOB.isubmit (
:jobno,
what => 'scott.proc1(3);',
next_date => SYSDATE,
interval => 'SYSDATE + 1/144 /* 1 Hour */');
COMMIT;
END;
I am getting the error :
BEGIN
ERROR at line 1:
ORA-01407: cannot update ("SYS"."JOB$"."JOB") to NULL
ORA-06512: at "SYS.DBMS_JOB", line 97
ORA-06512: at line 2
can anybody help me.

Answer 1

Look that you're using a variable to add the job number (JOBNO).
You forgot to assign a number to that variable. That's why it's giving you the error.
Tip 1: Remember that the job id you'll use must be unique.
You can query the user_jobs in order to veriyfy the assigned job ids that exists for you.
Tip 2: if you're not interested in assign a job id but instead would like that Oracle does it for you, use DBMS_JOB.SUBMIT instead of DBMS_JOB.ISUBMIT