Microsoft KB Archive/250395

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Article ID: 250395

Article Last Modified on 11/24/2003


  • 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 Q250395


A TN3270 client cannot connect to a TN3270 LU after the TN3270 LU is stopped through SNA Server Manager. The TN3270 LU shows an "Available" status after it is stopped from within SNA Server Manager, but TN3270 clients cannot use the session for a connection to the mainframe.

The session remains unavailable until after the TN3270 Idle Timeout expires or until the TN3270 service is stopped and restarted. The TN3270 Idle Timeout defaults to two hours.


The TN3270 server was not designed to clean up an active TN3270 session when the session was stopped through SNA Server Manager.


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


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section of this article.

This problem was first corrected in SNA Server 4.0 Service Pack 4.


The following steps describe how to stop a TN3270 LU from within SNA Server Manager:

  1. Highlight the TN3270 service in SNA Server Manager.
  2. Highlight the active TN3270 LU in the right pane of SNA Server Manager.
  3. Right-click the TN3270 LU, and then click Stop on the context menu.

Keywords: kbbug kbfix kbsna400presp4fix kbqfe kbsna400sp4fix KB250395