• Subject: Re: BSC line problem
  • From: Patrick Townsend <townsend@xxxxxxxxxxxxxx>
  • Date: Mon, 18 Oct 1999 15:46:40 -0700
  • Organization: Patrick Townsend & Associates, Inc.

Marv,

If you take a trace of the session that fails I'll take a look at it and
see if I can help. Right before you begin communications use STRSST,
option 1, then option 3, the F6 to create the trace. Set the buffer size
to 3 or 4 to have enough memory to avoid wrapping the trace. Run the
session, let it fail, print the trace, and email it. Also, record any
error messages that show up in your job log and in QSYSOPR.

Patrick

Marv Noltze wrote:
> 
> This is a lengthy message about a bisynch line problem that I have IBM
> stumped on. My site communicates our AS400 to a remote site via a BSC
> line. We use an ICF file and an online COBOL program to send and receive
> small transaction files. The remote site I dial into is a PC running
> commercial 3780 communication software.
>   We dial in daily to receive a small file (@30 records). This works fine.
> The problem is every week we try to receive a larger file(same structure
> just more records, usually 1200). This larger file fails everytime.
> My communication trace shows I get about 4 packets of data and then the
> two computers go into a loop where the remote sends me a '2D' request and
> mine acknowledges with a '1070'. This repeats about 10 times until the
> AS400 gives up and end the transmission. The remote site's trace shows the
> same series of characters being exchanged. Level 2 of IBM support says my
> configuration is fine and they have no suggestions. I talked to the higher
> level support for the commercial software vendor of the remote site and
> they are equally stumped. Nobody has any further answers or advice. They
> all say all configurations are fine.
>   My question(s):
>  Where do I go from here?
>  Has anyone else experienced hangups with bisynch lines like this?
>  I need to use a BSC line to be compatible with the remote site.
>  Yes, I have reviewed the manuals but they don't offer a clue.
> Thanks
> 
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-- 
IBM AS/400 communications, FTP automation, and network security
software and consulting services.

http://www.patownsend.com
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