SNA■ps 5250 Can‘t Connect, Config Problem (10/93)

Article Created: 13 October 1993


I'm having trouble connecting SNA*ps 5250 1.0 to a SNA*ps Gateway 2.0. I
have verified the gateway configuration and it is working. I'm starting 32
sessions and all sessions are contention winners. QAUTOVRT is set to 500.

When I start SNA*ps 5250 I get a zone list. I can see the gateway in the
gateway list. I can see both pool and session names in the pool/sessions
column.

SNA*ps 5250 control panel Local LU is set for PASSTHRU and Auto
Configuration. Local LU name on gateway is PASSTHRU.

When I select a session (or pool - I've tried it both ways) and click the
Connect button I get the error, "Couldn't connect to session because there
is an error communicating with the SNA*ps gateway."

I have tried to get a trace on the SNA*ps gateway and it showed nothing. I
also run an SNA trace on the AS/400 and there is no traffic related to
starting display station PASSTHRU or connecting a terminal session. No
errors are generated on the AS/400.

This leads me to believe that this is a problem with SNA*ps 5250 itself.
Gateway and terminal emulator are being run on the same Mac right now, but
I've also tried connecting 5250 sessions from other Macintoshs on network,
and get the same error message.

The gateway is a Macintosh IIci, 20 MB RAM, System 7.1, AppleTalk 58.0,
EtherTalk 2.5, Asante Ethernet card, 32-bit addressing on, file sharing
off.

I am certain this is not an SNA communications problem. This has something
to do with the connection between the gateway and the emulator.

Since the gateway bound all contention winner sessions correctly, we all
passed judgement on the correctness of the SNA*ps Gateway configuration too
quickly. The TP configuration of the SNA*ps Gateway was incorrect in the
Characteristics area on the dialog box. The SNA*ps 5250 emulator requires
the Basic/Mapped Verb radio button be selected and the PIP information
check box selected. You have the Basic radio button and no check box for
PIP information. The SNA*ps 5250 attach Verb call was rejected since it
requires Mapped verb support so you get the dialog box " Couldn't connect
to session because there is an error communication with the SNA*ps
gateway." This is a generalized failure to connect dialog box which is
displayed for the less often encountered attach errors.

You ended up with this TP configuration by using the Apple supplied sample
configs which come with the 2.0 gateway. You used that config file as a
base for other configuration entries and never checked on the
Characteristics required in the SNA*ps 5250 documentation. If you had done
the config from scratch, the normal TP defaults are Basic/Mapped and PIP
checked.



Published Date: Feb 19, 2012