DOCUMENT:Q234620 04-MAY-2002 [visualc] TITLE :PRB: Visual C++ Debugger Can Fail on Pentium III Computers PRODUCT :Microsoft C Compiler PROD/VER::6.0 OPER/SYS: KEYWORDS:kbDebug ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Visual C++, 32-bit Enterprise Edition, version 6.0 - Microsoft Visual C++, 32-bit Professional Edition, version 6.0 - Microsoft Visual C++, 32-bit Learning Edition, version 6.0 ------------------------------------------------------------------------------- SYMPTOMS ======== While debugging a DirectX application in the Visual C++ debugger on a Pentium III computer, you can get the following error: Unhandled exception in D3DIM.DLL 0xC000001D: Illegal instruction If you run the application outside the debugger, it may run without an error. CAUSE ===== On the Pentium III, exceptions are unmasked when debugging. This produces an error "Unhandled Exceptions" or "Illegal Instructions" error in Windows 98. RESOLUTION ========== The fix requires an updated version of VMCPD.VXD. You can get this file by contacting Microsoft Technical Support at: http://www.microsoft.com/support/ (http://www.microsoft.com/support/) Copy the file to the WINDOWS\SYSTEM directory and restart the computer. The updated version of the file is included in the Windows 98 update available for free download from the Microsoft internet site. Additional query words: ====================================================================== Keywords : kbDebug Technology : kbVCsearch kbAudDeveloper kbVC600 kbVC32bitSearch Version : :6.0 Issue type : kbprb Solution Type : kbpending ============================================================================= 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.