TN3270 Server Does Not Handle DACTLU/ACTLU Sequence Properly (163562)

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.