Re: tn5250 dropping fields

Wow...    I've never heard of anything like this with tn5250 before...

Instead of using tcpdump, use the "trace" feature of tn5250.   Do
something like:

       tn5250 trace=/home/nathaniel/trace.txt myas400

The trace output will be written to trace.txt.    Then, look at that file
to see what it's sending and receiving.

My best guess at this point is that there's a difference between the S/36
telnet daemon and the AS/400's telnet daemon that's causing you grief.

Has anyone else tried the emulator with a S/36?



On 6 Jul 2001, Nathaniel Smith wrote:

> I've been using tn5250 this summer to connect to a System 36 running
> inside a virtual host on an AS400 (I don't know whether this somewhat
> unusual configuration has any connection to my problem).  My problem,
> however, is this: as far as I can tell, tn5250 is not sending back the 
>contents
> of some fields.  It does work correctly for most fields, and I'm not sure
> what determines the fields that trigger this, but on some screens I enter
> things normally and the host responds as if I some fields had been blank
> that were not.
> 
> A few particular cases I've observed this in:  When I try to run RESTLIBR
> to restore from tape, I get an error because the S/36 thinks I haven't entered
> a tape location, and guesses wrong.  When I try to edit a file using whatever
> editor POP uses, I tend to blank out the file -- the fields used for the lines
> of the file are sent back blank, and the server thinks I've deleted them.
> When I try to compile a COBOL program (again from POP), I get errors
> required fields not being filled in, even though they are.
> 
> I've tried using tcpdump to spy on the data being passed back and forth
> in hopes of figuring out why some things work and some don't, but haven't
> had any luck -- no comprehensible ASCII seems to be passing over the
> link.  I could provide tcpdump logs if they would be useful, though.
> 
> I'm using the version of tn5250 from Debian unstable, which is 0.16.1.
> 
> Thanks in advance for any light you guys can shed on this issue -- I'm
> eager to get it solved, as until then I'm forced to go down the hall to the
> Windows box any time I want to access the S/36.
> 
> -- Nathaniel

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