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Q194081: Unable to Cancel TEST_RTS_AND_POST if Verb Issued Synchronously

Article: Q194081
Product(s): Microsoft SNA Server
Version(s): WINDOWS:3.0 SP1,3.0 SP2,3.0 SP3,4.0,4.0 SP1
Operating System(s): 
Keyword(s): kbbuglist
Last Modified: 21-OCT-2000

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The information in this article applies to:

- Microsoft SNA Server, versions 3.0 SP1, 3.0 SP2, 3.0 SP3, 4.0, 4.0 SP1 
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SYMPTOMS
========

If an APPC/CPI-C conversation is deallocated while a TEST_RTS_AND_POST command
is outstanding, the TEST_RTS_AND_POST may complete after the calling application
has deleted the post event, causing an application exception.

Steps to Reproduce the Problem
------------------------------

1. Issue the TEST_RTS_AND_POST verb synchronously.

2. End the application by issuing a DEALLOCATE command.

3. In the middle of the application's shutdown, TEST_RTS_AND_POST might set the
  event causing an application exception.

CAUSE
=====

The APPC library included in SNA Server was not designed to cancel an
outstanding TEST_RTS_AND_POST call when an APPC/CPI-C conversation was
deallocated.

RESOLUTION
==========

Microsoft has confirmed this to be a problem in SNA Server versions 3.0, 3.0
SP1, 3.0 SP2, 3.0 SP3, 4.0, and 4.0 SP1. We are researching this problem in SNA
Server version 3.0 and will post more information here in the Knowledge Base as
it becomes available.

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


MORE INFORMATION
================

This update will issue a CANCEL_TEST_RTS_AND_POST command when the DEALLOCATE
command is issued.

Additional query words:

======================================================================
Keywords          :  kbbuglist
Technology        : kbAudDeveloper kbSNAServSearch kbSNAServ400 kbSNAServ300SP3 kbSNAServ300SP1 kbSNAServ400SP1 kbSNAServ300SP2
Version           : WINDOWS:3.0 SP1,3.0 SP2,3.0 SP3,4.0,4.0 SP1
Issue type        : kbbug
Solution Type     : kbfix

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