Article: Q239707
Product(s): Microsoft SNA Server
Version(s): WINDOWS:4.0 SP2
Operating System(s):
Keyword(s): kbsna400sp3fix kbsna400sp2
Last Modified: 01-OCT-1999
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The information in this article applies to:
- Microsoft SNA Server, version 4.0 SP2
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SYMPTOMS
========
When TN3270 emulators are connecting through the TN3270 server (included with
SNA Server 4.0 Service Pack 2) to a host session, the TN3270 emulators may fail
to automatically reconnect if the session is terminated unexpectedly. The TN3270
emulator will reconnect to a host session if the user presses the Enter key.
The following message may be displayed in the TN3270 emulator window when the
host session is terminated unexpectedly:
TN3270E Service Error 505
SNA API verb <verb> failed.
NOTE: This message may not be displayed in the same manner for all TN3270
emulators.
When TN3270 emulators are configured to automatically connect, they successfully
reconnect to a host session after receiving the previous error message. This
occurs without any user intervention when they are connecting to a host session
through a TN3270 server, included with SNA Server versions prior to 4.0 Service
Pack 2 (SP2).
CAUSE
=====
The TN3270 server in SNA Server 4.0 SP2 was updated to use Windows NT I/O
Completion Ports to provide performance improvements. It is the use of I/O
Completion Ports that causes this particular problem to occur. Therefore, the
TN3270 server included with earlier versions of SNA Server does not exhibit this
behavior.
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
SP2. This problem was first corrected in SNA Server version 4.0 Service Pack 3.
MORE INFORMATION
================
For additional information about a similar TN3270 issue with SNA Server 4.0 SP2,
please click the article number(s) below to view the article(s) in the Microsoft
Knowledge Base:
Q230220 Emulators May Fail to Reconnect After Inactivity Timeout
Additional query words:
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Keywords : kbsna400sp3fix kbsna400sp2
Technology : kbAudDeveloper kbSNAServSearch kbSNAServ400SP2
Version : WINDOWS:4.0 SP2
Issue type : kbbug
Solution Type : kbfix
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