DOCUMENT:Q257759 13-JUN-2001 [sna] TITLE :TN5250 Service Ends Unexpectedly When Client Disconnects PRODUCT :Microsoft SNA Server PROD/VER:WINDOWS:4.0,4.0 SP1,4.0 SP2,4.0 SP3 OPER/SYS: KEYWORDS:kbSNA400sp4fix kbSNA400PreSP4fix ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft SNA Server, versions 4.0, 4.0 SP1, 4.0 SP2, 4.0 SP3 ------------------------------------------------------------------------------- SYMPTOMS ======== The TN5250 Service may end unexpectedly when a TN5250 client disconnects. This problem occurs when you use the WRQ Reflections TN5250 client, although it can also occur with other client emulators. When the failure occurs, a Ddrwtsn32.log file indicates that a hard-coded breakpoint occurred. For example: Application exception occurred: App: obj\i386\tn5250.exe (pid) When: (date) (time) Exception number: 80000003 (hardcoded breakpoint) [...] State Dump for Thread Id 0x1b9 eax=00000000 ebx=0110fc74 ecx=00000085 edx=0110fbe8 esi=78022b9a edi=0110fbea eip=77f762e8 esp=0110fb14 ebp=0023c951 iopl=0 nv up ei pl nz ac po nc cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00000216 [...] function: DbgBreakPoint FAULT ->77f762e8 cc int 3 77f762e9 c3 ret 77f762ea 8bc0 mov eax,eax *--- Stack Back Trace ----* FramePtr ReturnAd Param#1 Param#2 Param#3 Param#4 Function Name 0023c951 00000000 00000000 00000000 00000000 00000000 ntdll!DbgBreakPoint 00000000 00000000 00000000 00000000 00000000 00000000 tn5250!nosymbols CAUSE ===== A timing window can occur during client shutdown processing when an outstanding TEST_RTS_AND_POST verb is cancelled and TP_ENDED is called twice in error. When the second TP_ENDED returns an error, the TN5250 Service may force a hard-coded breakpoint, causing the process to end. RESOLUTION ========== To resolve this problem, obtain the latest service pack for SNA Server 4.0. For additional information, click the following article number to view the article in the Microsoft Knowledge Base: Q215838 How to Obtain the Latest SNA Server Version 4.0 Service Pack STATUS ====== Microsoft has confirmed that this is a problem in Microsoft SNA Server version 4.0, 4.0 SP1, 4.0 SP2 and 4.0 SP3. This problem was first corrected in SNA Server 4.0 Service Pack 4. Additional query words: ====================================================================== Keywords : kbSNA400sp4fix kbSNA400PreSP4fix Technology : kbAudDeveloper kbSNAServSearch kbSNAServ400 kbSNAServ400SP1 kbSNAServ400SP2 kbSNAServ400SP3 Version : WINDOWS:4.0,4.0 SP1,4.0 SP2,4.0 SP3 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 2001.