Microsoft KB Archive/279335

= Cannot Add the Same Workstation Restrictions to Multiple TN3270 LUs =

Article ID: 279335

Article Last Modified on 2/20/2007

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APPLIES TO


 * Microsoft Host Integration Server 2000 Standard Edition

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This article was previously published under Q279335



SYMPTOMS
If you add the same workstation name or TCP/IP (Transfer Control Protocol/Internet Protocol) address to multiple TN3270 LUs in SNA Manager on Host Integration Server (HIS) 2000, you may receive the following error message:

The name or alias has already been used.

This problem does not occur with SNA Server 4.0.



CAUSE
The HIS 2000 management interface incorrectly checks the validity of TN3270 LU restrictions to make sure there are no duplicate entries.



RESOLUTION
To resolve this problem, obtain the latest service pack for Host Integration Server 2000. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

328152 How to Obtain the Latest Host Integration Server 2000 Service Pack

The English version of this fix should have the following file attributes or later:   File name   Date        Time ---  snacfg.dll  12/05/2000  12:00PM NOTE: Because of file dependencies, the most recent fix that contains the above files may also contain additional files.



WORKAROUND
If you need to allow a user to have access to a specific set of TN3270 display LUs, the following configuration may resolve the problem:
 * 1) Create an LUA (Logical Unit Application) pool.
 * 2) Assign the LUA LUs to the LUA pool instead of assigning them to the TN3270 server.
 * 3) Assign the LUA pool to the TN3270 server.
 * 4) Add the workstation name or TCP/IP address restriction to the LUA pool from the previous step.

If you need to allow multiple users to have access to a specific set of TN3270 display LUs, then a unique LUA pool must be created for each user and the steps outlined here must be repeated for each pool.



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article. This problem was first corrected in Host Integration Server 2000 Service Pack 1.



MORE INFORMATION
The following steps can be used to reproduce the problem:
 * 1) Assign two (or more) LUs to the TN3270 server in SNA Manager.
 * 2) Configure one of the TN3270 LUs such that it is restricted for access by a workstation called &quot;Client1&quot;.
 * 3) Configure the other TN3270 LU and add Client1 as the workstation name.

When the changes to the second TN3270 LU are applied, the result is the error message described in the &quot;Symptoms&quot; section. The same problem occurs if a TCP/IP address is used instead of a workstation name.

You can assign the same workstation name or TCP/IP address to multiple TN3270 LUs if you want to allow a user to have access to multiple TN3270 sessions in an environment that does not tend to allow users access to all of the available TN3270 LUs.

For additional information about restricting access to TN3270 LUs, click the article number below to view the article in the Microsoft Knowledge Base:

190446 Restricting Access to TN3270 LUs

Additional query words: HIS 2000

Keywords: kbqfe kbbug kbfix kbhostintegserv2000presp1fix kbhostintegserv2000sp1fix KB279335

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