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Q163562: TN3270 Server Does Not Handle DACTLU/ACTLU Sequence Properly

Article: Q163562
Product(s): Microsoft SNA Server
Version(s): WINDOWS:2.11,2.11 SP1,2.11 SP2,3.0,3.0 SP1
Operating System(s): 
Keyword(s): kbnetwork
Last Modified: 13-JUN-2001

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The information in this article applies to:

- Microsoft SNA Server, versions 2.11, 2.11 SP1, 2.11 SP2, 3.0, 3.0 SP1 
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SYMPTOMS
========

After logging off of some host applications (such as TSO), a TN3270 display or
printer emulator may be unable to reconnect through the TN3270 server until the
user disconnects and reconnects his or her TN session.

CAUSE
=====

With some host applications (such as TSO), the host sends Deactivate Logical
Unit (DACTLU) and Activate Logical Unit (ACTLU) request units to recycle the
logical unit (LU) following a user logoff. The TN3270 Server component
disconnects the LU after receiving the DACTLU.

WORKAROUND
==========

To work around this problem, reconnect the client.

The TN3270 service and the RUI library have been updated to handle the case where
the host resets an LU by sending a DACTLU followed by an ACTLU.

STATUS
======

Microsoft has confirmed this to be a problem in Microsoft SNA Server versions
2.11 (and all Service Packs), 3.0, and 3.0 Service Pack 1.

This problem was corrected in the latest SNA Server version 3.0 U.S. Service
Pack. For information on obtaining this Service Pack, query on the following
word in the Microsoft Knowledge Base (without the spaces):

  S E R V P A C K

A supported fix for SNA Server version 2.11 is now available, but has not been
fully regression-tested and should be applied only to s ystems experiencing this
specific problem. Unless you are severely impacted by this specific problem,
Microsoft recommends that you wait for the next Service Pack that contains this
fix. Contact Microsoft Product SupportServices for more information.

Additional query words: sp1 prodsna

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Keywords          : kbnetwork 
Technology        : kbAudDeveloper kbSNAServSearch kbSNAServ300 kbSNAServ211 kbSNAServ211SP1 kbSNAServ211SP2 kbSNAServ300SP1
Version           : WINDOWS:2.11,2.11 SP1,2.11 SP2,3.0,3.0 SP1

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