The First TN3270 Client on an OnDemand Connection Fails

• Microsoft SNA Server, version 4.0 SP2

SYMPTOMS

After you apply SNA Server 4.0 Service Pack 2 (SP2), TN3270 users may experience one of the following problems:

• The first TN3270 client that connects to an OnDemand connection fails. The connection is brought up, but the client remains in a not responding state, and the LU shows in SSCP state. This only affects the first client; all subsequent clients connect successfully. If the connection is set to Server Startup, everything works fine.



• If the host uses DDDLUs, TN3270 clients may display the following error message when they start a host session through the SNA Server TN3270 server:

  TN3270E Service Message 525
  
  The PU is active for LU <LU name>.
  
  You may continue to wait, or terminate your session.

  After the error message appears, the user may be able to obtain a host session by disconnecting and then reconnecting the session from within the TN3270 emulator.
  
  For additional information about SNA Server's DDDLU support for 3270 and LUA LUs, please see the following articles in the Microsoft Knowledge Base:




Q161492 LU Session Activation Using Dynamically Defined Dependent LUs

Q164592 Dynamically Defined Dependent LU Support for LUA LUs

RESOLUTION

To resolve this problem, obtain the latest service pack for SNA Server version 4.0. For additional information, please see the following article in the Microsoft Knowledge Base:

Q215838 How to Obtain the Latest SNA Server Version 4.0 Service Pack

STATUS

Microsoft has confirmed this to be a problem in Microsoft SNA Server version 4.0 service pack 2. This problem was first corrected in SNA Server version 4.0 Service Pack 3.

Additional query words: snatn3270

Keywords : sna4sp3fix sna4sp2
Version : WINDOWS:4.0 SP2
Platform : WINDOWS
Issue type : kbbug