DOCUMENT:Q151201 13-JUN-2001 [sna] TITLE :Unbind Hold Causes TN3270 Client 505 Error PRODUCT :Microsoft SNA Server PROD/VER:WINDOWS:2.11,2.11 SP1 OPER/SYS: KEYWORDS:kbnetwork ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft SNA Server, versions 2.11, 2.11 SP1, on platform(s): - the operating system: Microsoft Windows NT ------------------------------------------------------------------------------- SYMPTOMS ======== When you log onto a host system through the SNA Server version 2.11sp1 TN3270E service, the TN3270 user may receive a 505 error and lose his or her session. If this occurs, the SNA Server TN3270E service will log the following events into the Microsoft Windows NT application event log: - Event 601 TN3270(E) session established with client at xxx.xxx.xxx.xxx (port xxxx) using LU LAA9. - Event 309 WRITE failed with LUA_STATE_CHECK / LUA_MODE_INCONSISTENCY for xxx.xxx.xxx.xxx (port xxxx). - Event 603 TN3270(E) session with client at xxx.xxx.xxx.xxx (port xxxx) using LU LAA9 terminated abnormally because: TN3270E Service Error 505 - Event 3065 A Bind sent by the host for a 3270 session was rejected - Event 902 Logic error in module SNASessionTerminate identified by:.SNAWriteBuffersInUse CAUSE ===== When a 3270 user tries to access a host application through a host session manager, the session manager typically sends an UNBIND(bind forthcoming, or 0x02) followed by a BIND from the host application that was requested. The TN3270 server was not properly handling the UNBIND, which was causing its LUA RUI_WRITE call to fail. Therefore, it caused the TN3270 server to end the session. However, the TN3270 server now correctly ignores this error. STATUS ====== Microsoft has confirmed this to be a problem in SNA Server versions 2.11 and 2.11.sp1. This problem was corrected in the latest Microsoft SNA Server 2.11 U.S. Service Pack. For information on obtaining the 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 ================ The host sends a data message, followed by an UNBIND (bind forthcoming). The TN3270 Server issues a response to the data message. However, by that point the RUI library has received the UNBIND (bind forthcoming) request, and has switched states to Session Terminating state. In this state it rejects the response message from the TN3270 Server, with the error LUA_STATE_CHECK / LUA_MODE_INCONSISTENCY. Additional query words: prodsna sp1 ====================================================================== Keywords : kbnetwork Technology : kbAudDeveloper kbSNAServSearch Version : WINDOWS:2.11,2.11 SP1 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.