DOCUMENT:Q182578 15-MAR-2000 [sna] TITLE :MC_CONFIRMED Stops Following what_rcvd=AP_CONFIRM_DEALLOCATE PRODUCT :Microsoft SNA Server PROD/VER:WINDOWS:3.0,3.0 SP1,3.0 SP2,3.0 SP3,4.0 OPER/SYS: KEYWORDS: ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft SNA Server, versions 3.0, 3.0 SP1, 3.0 SP2, 3.0 SP3, 4.0 ------------------------------------------------------------------------------- SYMPTOMS ======== If an APPC application is using confirmation processing on an LU6.2 conversation and receives an MC_RECEIVE_AND_WAIT response with a what_rcvd value of AP_CONFIRM_DEALLOCATE (0x0400), the application's call to MC_CONFIRMED may stop responding. CAUSE ===== The SNA Server was not resetting an error indicator on an internal LU6.2 control block between reuses of the control block. So, if an error occurs on a prior conversation over a session (for example, following an APPC application issuing an [MC_]SEND_ERROR), the current conversation may fail unexpectedly when the current session is brought down incorrectly. STATUS ====== Microsoft has confirmed this to be a problem in SNA Server versions 3.0, 3.0 SP1, 3.0 SP2, and 3.0 SP3. Microsoft is researching this problem and will post new information here in the Microsoft Knowledge Base as it becomes available. Microsoft has confirmed this to be a problem in SNA Server version 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 Additional query words: ====================================================================== Keywords : Technology : kbAudDeveloper kbSNAServSearch kbSNAServ300 kbSNAServ400 kbSNAServ300SP3 kbSNAServ300SP1 kbSNAServ300SP2 Version : WINDOWS:3.0,3.0 SP1,3.0 SP2,3.0 SP3,4.0 Issue type : kbbug Solution Type : kbfix ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 2000.