DOCUMENT:Q166845 13-JUN-2001 [sna] TITLE :TN3270E Service Error 503 - Session Dropped Due to Inactivity PRODUCT :Microsoft SNA Server PROD/VER:WINDOWS:2.11,2.11 SP1,2.11 SP2,3.0,4.0 OPER/SYS: KEYWORDS: ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft SNA Server, versions 2.11, 2.11 SP1, 2.11 SP2, 3.0, 4.0 ------------------------------------------------------------------------------- SUMMARY ======= The SNA Server TN3270 Server configuration includes an Idle Timeout parameter which causes the server to disconnect a TN3270 client session after the session has been inactive for the idle timeout period. The idle timeout period defaults to 120 minutes or 2 hours. When the Idle Timeout expires for a TN3270 client session, the TN3270 server drops the client's SNA session and sends the following message to the TN3270 client to display to the user: TN3270E Service Error 503 Session terminated due to inactivity. When this occurs, the TN3270 Server will also report the following event to the Windows NT Server Event Viewer Application log: Event ID: 603 Source: TN3270 Server Description: TN3270(E) session with client at using LU terminated abnormally because: TN3270E Service Error 503 Session terminated due to inactivity NOTE: Event ID 603 can occur for a variety of reasons. Service Error 503 is a specific cause for an abnormal session termination caused only by the TN3270 Server's idle timeout parameter. MORE INFORMATION ================ The TN3270 Server Idle Timeout parameter can be set from 1 minute to 1440 minutes (or 1 day). Here are instructions for setting this parameter: - If you are using SNA Server 2.11 (or 2.11 service pack 1 or 2), run the TN3270 Service Admin program and choose the <Options> button. - If you are using SNA Server 3.0 (or 3.0 service pack 1), run the SNA Server Manager program, right-click on the TN3270 Server, choose the Properties button, and choose the Settings folder. Additional query words: ====================================================================== Keywords : Technology : kbAudDeveloper kbSNAServSearch kbSNAServ300 kbSNAServ211 kbSNAServ400 kbSNAServ211SP1 kbSNAServ211SP2 Version : WINDOWS:2.11,2.11 SP1,2.11 SP2,3.0,4.0 ============================================================================= 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.