Microsoft KB Archive/178256

= LUA Program Hangs After Receiving Exception Request (EXR) =

Article ID: 178256

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

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This article was previously published under Q178256



SYMPTOMS
An SNA Server LUA application may hang indefinately after receiving an exception request (EXR) message on a session, which SNA Server sends to the client after it has detected a bad RU in an outbound message from the host.



CAUSE
If the host sends a bad RU on a session, the SNA Server changes the message to Exception Request type (EXR) before sending it to the LUA application. However, SNA Server was failing to set the End Chain (EC) indicator on the EXR message, causing the LUA application to hang indefinately waiting for EC to be received.



STATUS
Microsoft has confirmed this to be a problem in SNA Server 3.0 (including SP1 and SP2).

This problem was corrected in the latest SNA Server version 3.0 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

Keywords: kbbug kbfix kbqfe kbhotfixserver KB178256

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