DOCUMENT:Q167196 11-JUN-2002 [sna] TITLE :SNA Server 3.0 SP1 Update May Break Named Pipe Clients PRODUCT :Microsoft SNA Server PROD/VER:WINDOWS:3.0 SP1 OPER/SYS: KEYWORDS:kbnetworkkbbuglist ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft SNA Server, version 3.0 SP1 ------------------------------------------------------------------------------- IMPORTANT: This article contains information about modifying the registry. Before you modify the registry, make sure to back it up and make sure that you understand how to restore the registry if a problem occurs. For information about how to back up, restore, and edit the registry, click the following article number to view the article in the Microsoft Knowledge Base: Q256986 Description of the Microsoft Windows Registry SYMPTOMS ======== After you apply SNA Server 3.0 Service Pack 1, named pipe clients may be unable to get sponsor connections to the computer running SNA Server. When you start the SnaBase service on an SNA Server Windows NT 3.x client configured to use Microsoft Networking (Named Pipes), the following error message appears: SNA Server - Error # 1003 SNABase Could Not open Sponsor Connection To Server . This problem does not occur if the sponsor connection is configured to a SNA Server 3.0 Server (Service Pack 1 not applied) or if TCP/IP is selected in the "Select Client/Server Protocol for Client Setup" dialog box on the client. NOTE: This error message can appear for other reasons as well. CAUSE ===== The SNA Server 3.0 Service Pack 1 update program updates the NullSessionPipes registry value, but fails to correctly add null- termination to the end of the last entry: HKEY_LOCAL_MACHINE\System\ CurrentControlSet\Services\LanmanServer\Parameters\ NullSessionPipes:REG_MULTI_SZ: COMNAP COMNODE SQL\QUERY SPOOLSS LLSRPC EPMAPPER LOCATOR COMPROXY COMNETM The last character of the last entry has been truncated, and is missing the terminating carriage return. RESOLUTION ========== To work around this problem: WARNING: Using Registry Editor incorrectly can cause serious, system-wide problems that may require you to reinstall Windows NT to correct them. Microsoft cannot guarantee that any problems resulting from the use of Registry Editor can be solved. Use this tool at your own risk. 1. Start Registry Editor (Regedt32.exe). 2. Under the HKEY_LOCAL_MACHINE subtree, go to the following subkey: System\CurrentControlSet\Services\LanmanServer\Parameters\ 3. Double-click NullSessionPipes. 4. Change the last entry to COMNETMN and press ENTER. 5. Click OK. 6. Perform a shutdown and restart of Windows NT for the change to take effect. STATUS ====== Microsoft has confirmed this to be a problem in SNA Server 3.0 SP1. This problem was corrected in the latest SNA Server version 3.0 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 : kbnetwork kbbuglist Technology : kbAudDeveloper kbSNAServSearch kbSNAServ300SP1 Version : WINDOWS:3.0 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 2002.