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  • Subject: Re: Data queue to web app
  • From: Wayne Capwell <wayne@xxxxxxxxxxxxxx>
  • Date: Wed, 01 Dec 1999 14:02:26 -0500
  • Organization: Red Oak Technologies, Inc.

Thanks, I checked and the max frame size is set to 1496, well in excess
of the 680 that seems to be our limit.  Is there and justification to
increase the frame size?  How big should it be?
Any help appreciated.
Thanks
Wayne

Patrick Townsend wrote:
> 
> Wayne,
> 
> I can't answer the questions about ADO, but check the Max frame size on
> your AS/400's ethernet line description. You might need to increase it
> to handle larger buffers of data without breaking up the TCP frame.
> 
> Patrick
> 
> Wayne Capwell wrote:
> >
> > Hello,
> > We have modified a group of RPG programs to use data queues instead of
> > display files to communicate with an internet connected browser. We
> > created physical files that emulate the display file formats and send
> > and receive the data queues in the RPG programs instead of reading and
> > writing the display file formats.  We create the data queues on the
> > AS/400 with a length of 2000 characters.
> >
> > On the web server side, we created a dll using Visual Basic 6.0 and
> > Microsoft ADO objects to receive the data queue information and present
> > it to our server application.  The web application parses the data queue
> > string into the browser pages.  We also have prefined character strings
> > that emulate the function keys, etc. that sends data back to the
> > AS/400,  so the RPG program can complete the read data queue function
> > and continue with its normal processing.
> >
> > All works well when we send less than 680 characters of data. However,
> > when the RPG program sends more than 680, the VB dll get an "Automation
> > Error" and ceases processing.  We have tried several iterations of the
> > VB with the same results.  We know the data queue contains all the
> > information on the AS/400 side.
> >
> > If anyone knows of this problem or even knows of a resource in IBM or
> > Microsoft that can help, I would greatly appreciate the help.
> > Here are our questions:
> >
> > 1) What version of ADO is recommended? The app currently uses Microsoft
> > OLE DB ADO Library 1.0.  All other versions of ADO we try crashes. Are
> > all versions of ADO supported?
> >
> > 2) Why can we send 2000 characters to the data queue, but only receive
> > approx. 680 characters? This causes an "Automation Error".  Why?
> >
> > 3). Could they provide code samples of using ADO to communicate with
> > AS400 data queues. We used samples from IBM's web site to develop what
> > we are using now. Any examples in particular of moving large record sets
> > to and from data queues. All samples from IBM's web site sends and
> > receives
> >  small amounts of data.
> >
> > TIA
> >
> > Wayne
> > --
> > ______________________________________
> > Wayne W. Capwell
> > Red Oak Technologies, Inc.
> > 11301 Carmel Commons Blvd., Suite 114
> > Charlotte, NC  28226
> > 704-945-1067
> >
> > Manufacturing...Production...Solutions
> >      http://www.redoaktech.com/
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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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-- 
______________________________________
Wayne W. Capwell
Red Oak Technologies, Inc.
11301 Carmel Commons Blvd., Suite 114   
Charlotte, NC  28226
704-945-1067

Manufacturing...Production...Solutions
     http://www.redoaktech.com/
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