TN3270 Server Does Not Handle DACTLU/ACTLU Sequence Properly

 Last reviewed: March 19, 1998
Article ID: Q163562
The information in this article applies to:
  • Microsoft SNA Server, versions 2.11 (and all Service Packs), 3.0, and 3.0 Service Pack 1

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
Keywords : kbbug2.11 kbbug2.11.sp1 kbfix2.11.sp2 snalua snatn3270 kbfix3.00.sp2 kbnetwork
Version : 2.11 2.11.sp1
Platform : WINDOWS

THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY.

Last reviewed: March 19, 1998
© 1998 Microsoft Corporation. All rights reserved. Terms of Use.