In <[EMAIL PROTECTED]>, on
12/08/2005
at 03:14 PM, Luo Johnny <[EMAIL PROTECTED]> said:
>1,In TSO,I use 'listalc status' to find that SYS1.UADS has been
> allocated to DDNAME 'SYSUADS'. For a test, I issue
> 'allocate dsn(center.uads) dd(sysuads)' and get the meesage that
> filename is in use. I resort to manuals and know that to do this
> I must use 'REUSE' operand.
> However,I submit a job via JCL which also uses DDNAME 'SYSUADS'
> and there is no problem.
Put the same DD statement in your logon JCL and there will also not be
a problem. The problem is doing a TSO ALLOCATE with a ddname that is
already in use. Chage the batch job to do an ALLOCATE in the same
context and you'll get the same error message.
>2,I have a simple cobol program who just opens a input file and
> closes it(select infile assign to infile). First I issue
> 'allocate dsn(md0006.input.qsam) dd(infile)' and succeed. Then I
> can use TSO command 'call' to execute the program successfully.
> However,when I execute the program via JCL without coding infile
> DDNAME, it fails.
Why would you expect otherwise?
>So I want to know the exact reason.
Your program referred to a ddname that you hadn't allocated.
>My personal guess is that a job submitted by JCL is not executed in
>my TSO address space.
That's the whole point of submitting a job; it's an independent unit
of work. If you want to call a program in your address space, use CALL
or something similar.
--
Shmuel (Seymour J.) Metz, SysProg and JOAT
ISO position; see <http://patriot.net/~shmuel/resume/brief.html>
We don't care. We don't have to care, we're Congress.
(S877: The Shut up and Eat Your spam act of 2003)
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