Microsoft KB Archive/182374

= TN5250 Event ID 16 Error Causing APPC Session To Fail =

Article ID: 182374

Article Last Modified on 9/22/2005

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APPLIES TO


 * Microsoft SNA Server 3.0 Service Pack 4
 * Microsoft SNA Server 4.0
 * Microsoft SNA Server 3.0 Service Pack 2
 * Microsoft SNA Server 3.0 Service Pack 3
 * Microsoft SNA Server 4.0

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This article was previously published under Q182374



SYMPTOMS
In some situations, such as performing a screen save from a TN5250 session to the AS400, the APPC session fails (the AS/400 rejects one of the messages) and an Event ID 16 is logged from the TN5250 Service on the SNA Server computer with the following text:   The SNA TN5250 Service detected an unexpected passthrough parameter data area flag from the client at.

The client should not generate this information and it has been suppressed. Please verify that the client software has all fix updates applied.



CAUSE
In some cases, the data flow comes across two socket calls. The TN5250 Service is incorrectly handling the second call, causing the problem to occur.



SNA Server 4.0
This problem was corrected in the latest SNA Server version 4.0 U.S. Service Pack. For information on obtaining this Service Pack, query on the following word in the Microsoft Knowledge Base (without the spaces):

S E R V P A C K

SNA Server 3.0
To resolve this problem, obtain the latest service pack for SNA Server version 3.0. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

184307 How to Obtain the Latest SNA Server Version 3.0 Service Pack



STATUS
Microsoft has confirmed that this is a problem in Microsoft SNA Server, versions 3.0,3.0 SP1, 3.0 SP2, 3.0 SP3,4.0. This problem was first corrected in SNA Server 3.0 Service Pack 4.



MORE INFORMATION
With the update applied, the TN5250 Service functions correctly in this situation.

Keywords: kbbug kbfix kbqfe kbhotfixserver KB182374

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