Date:         Wed, 11 Apr 2007 11:35:07 +0200
Reply-To:     SAS-L List <sas-l@listserv.uga.edu>
Sender:       "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:         Robert Bardos <bardos2@ANSYS.CH>
Subject:      Re: Filename FTP timeing-out on Z/OS tapemount?
In-Reply-To:  <e15b88e4c261.461c0a7f@optonline.net>
Content-Type: text/plain; charset="us-ascii"

David Mabey asked:
> Gesendet: Mittwoch, 11. April 2007 00:07

>
> I am using FILENAME FTP to feed a large file that
> resides on z/OS tape to a batch SAS DATASTEP running
> on a PC.  Every thing works fine until the tape robot
> needs to mount a new tape. Then the job hangs. The SAS
> log never completes and the SAS dataset that is being
> produced remains locked.
>
> I suspect that FTP is timing-out, but I don't know how
> to fix the problem.
>
>  Thanks for any help you can give.
>
>  Dave
>


Dave,

the following is not a solution to your problem.
It's a diagnostic aid rather.

Try

  filename <your_filename> ftp ''
           host='<your_host>'
           prompt
           rstat
           ;

  data _null_;
    infile <your_filename>;
    input;
    put _infile_;
  run;

  filename <your_filename> clear;

One of the lines returned will say e.g.
211-INACTIVITY TIMER IS SET TO 300

Unfortunately I haven't found a way to override this value (when
doing the transfer from the PC side). In z/OS batch one could try
things like

  //      EXEC PGM=FTP,PARM='INACTIVE 86400'

or

  //      EXEC PGM=FTP
  //SYSFTPD DD *
  INACTTIME 86400

where 86400 is the maximum allowed value in seconds (a value you
would never use!).

So this all centers around the idea of a timeout condition causing
the problem you described. Your 'never completes and ... remains
locked' remark however makes me doubt whether it is in fact a
timeout problem.

Next thing I tried was to find where these 300 seconds are
defined.
So I did from TSO Option 6 (or most simply from a CMDE window):

  ftp localhost    or   ftp <your_host>
  <logged in>
  quit

And then checked in SDSF/EJES/whatever what DSnames had been
allocated last to my TSO session. Here I found e.g. SYS1.TCPPARMS
and therein the member FTPDATA. Within this member the line

  INACTIVE      300             ; inactive time out

To have this entry changed you'd have to contact your system
programmers.


Robert Bardos
Ansys AG, Zurich, Switzerland