Article ID: 276470
Article Last Modified on 2/21/2007
APPLIES TO
- Microsoft Host Integration Server 2000 Standard Edition
- Microsoft SNA Server 4.0
- Microsoft SNA Server 3.0 Service Pack 2
- Microsoft SNA Server 3.0 Service Pack 3
- Microsoft SNA Server 3.0 Service Pack 4
- Microsoft SNA Server 4.0
- Microsoft SNA Server 4.0 Service Pack 1
- Microsoft SNA Server 4.0 Service Pack 2
- Microsoft SNA Server 4.0 Service Pack 3
This article was previously published under Q276470
SYMPTOMS
SNA Server may fail to dynamically activate a logical unit (LU), through the host Dynamic Definition of Dependent LUs (DDDLUs), after the physical unit (PU) on the mainframe has been recycled. The result is that the LUs that are defined on this host connection may show a "pending" status when viewed in SNA Server Manager after an application tries to connect to the LUs. The application that is trying to reconnect to the LU at this point cannot get an active session to the host.
The same problem may occur when the host connection is stopped and restarted through SNA Server Manager.
CAUSE
The SNA Server service doesn't check whether the LU-System Services Control Point (SSCP) session is down before it tries to send the Network Management Vector Table (NMVT) request to deactivate the session when an application disconnects. This results in the SNA Server not sending an NMVT request to activate the LU when an application tries to reconnect to an available LU.
NOTE: The LU will be available again once the PU is activated on the host or the connection is restarted on SNA Server.
RESOLUTION
To resolve this problem, obtain the latest service pack for SNA Server 4.0. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
215838 How to Obtain the Latest SNA Server Version 4.0 Service Pack
STATUS
Microsoft has confirmed that this is a problem in Microsoft SNA Server versions 3.0 (all Service Packs), 4.0, 4.0 SP1, 4.0 SP2, 4.0 SP3.
This problem was first corrected in SNA Server 4.0 Service Pack 4.
MORE INFORMATION
For additional information about SNA Server and DDDLUs, click the article numbers below to view the articles in the Microsoft Knowledge Base:
161492 INFO: LU Session Activation Using Dynamically Defined Dependent LUs
164592 Dynamically Defined Dependent LU Support for LUA LUs
276453 Dynamically Defined Dependent LU Support for Printer LUs
Additional query words: Snaservr sp1 sp2 sp3 service pack sp
Additional query words: HIS 2000
Keywords: kbbug kbfix kbsna400presp4fix kbqfe kbsna400sp4fix KB276470
