DOCUMENT:Q164758 08-AUG-2001 [winnt] TITLE :Remote Procedure Call (RPC) Service Access Violation PRODUCT :Microsoft Windows NT PROD/VER:winnt:4.0 OPER/SYS: KEYWORDS:kbhw kbnetwork kbRPC kbSDKPlatform kbGrpDSNet kbHardwarekbbuglist kbfixlist ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Windows NT Workstation version 4.0 - Microsoft Windows NT Server version 4.0 ------------------------------------------------------------------------------- SYMPTOMS ======== The remote procedure call (RPC) service fails with an access violation. Typically, this produces a failure report in the Drwtsn32.log file that looks similar to the following: Application exception occurred: App: exe\rpcss.dbg (pid=129) When: 03/04/1997 @ 11:17:7.316 Exception number: c0000005 (access violation) CAUSE ===== A corrupt RPC packet is being sent to the remote procedure call (RPC) service. The code that unmarshalls the data (unpacks it for execution) fails under certain conditions of packet corruption. RESOLUTION ========== The only workaround to the problem is to determine the cause of the RPC packet corruption from the client. This has been historically traced back to hardware problems caused by a failure to copy the bytes of the packet correctly by a router, bridge, or network card. In one instance, a network card was using bus mastering I/O and this appeared to be causing the frame to be transmitted improperly. Disabling bus mastering on the client network card solved this problem. STATUS ====== Microsoft has confirmed this to be a problem in Windows NT version 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: ====================================================================== Keywords : kbhw kbnetwork kbRPC kbSDKPlatform kbGrpDSNet kbHardware kbbuglist kbfixlist Technology : kbWinNTsearch kbWinNTWsearch kbWinNTW400 kbWinNTW400search kbWinNT400search kbWinNTSsearch kbWinNTS400search kbWinNTS400 Version : winnt: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.