DOCUMENT:Q164812 08-AUG-2001 [winnt] TITLE :Computer Name Truncated When Name Resolution Attempted PRODUCT :Microsoft Windows NT PROD/VER:winnt:3.51,4.0 OPER/SYS: KEYWORDS:kbnetwork kbAPI kbSDKPlatform kbNetAPI kbGrpDSNet ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Windows NT Workstation versions 3.51, 4.0 - Microsoft Windows NT Server versions 3.51, 4.0 ------------------------------------------------------------------------------- SYMPTOMS ======== When name resolution for the Primary Domain Controller (PDC) is required over any of the installed network protocols bound to NetBIOS, and the PDC's machine name is 14 characters or longer, the name queries truncate the computer name to 13 characters, and a negative response occurs. As a result, you may experience one or more of the following: - Extra network traffic - Long response time with some domain operations - Administrative Tools unusable - Unable to change domain passwords Name queries that are formatted for broadcast, WINS, and DNS are all affected by this problem. CAUSE ===== The NetGetDCName Win32 API is used to retrieve the name of the PDC on a domain. If the PDC s name is greater than 13 characters, this API caches the local PDC name incorrectly. If a second call is made, NetGetDCName tries to connect to this invalid PDC name, causing extra network traffic and a longer response time. STATUS ====== Microsoft has confirmed this to be a problem in Windows NT versions 3.51 and 4.0. This problem was corrected in the latest Microsoft Windows NT 4.0 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 Additional query words: unable locate find netlogon ====================================================================== Keywords : kbnetwork kbAPI kbSDKPlatform kbNetAPI kbGrpDSNet Technology : kbWinNTsearch kbWinNTWsearch kbWinNTW400 kbWinNTW400search kbWinNT351search kbWinNT400search kbWinNTW351search kbWinNTW351 kbWinNTSsearch kbWinNTS400search kbWinNTS400 kbWinNTS351 kbWinNTS351search Version : winnt:3.51,4.0 Issue type : kbbug ============================================================================= 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.