Installing System Debug Symbols
To debug a crash that occurs during a system call, you will often need system DBG or PDB files, which contain symbols for Windows DLLs, EXEs, and device drivers. You can obtain these symbols from several places:
- The Visual Studio .NET CD-ROM contains symbol files for selected versions of Windows.
- The OS Support Tools CD-ROM contains symbol files for Windows 2000 and Windows XP.
- You can download the latest symbols for your version of Windows from http://www.microsoft.com/ddk/debugging/symbols.asp.
- You can download symbols automatically from the Microsoft symbol server at http://msdl.microsoft.com/download/symbols or from a local symbols server that is set up on your intranet. For details, see Using a Symbol Server..
Error: No Matching Symbolic Information
If you attempt to debug a system call without having the proper symbols installed, the Visual Studio debugger reports the follow message:
no matching symbolic information found
Even if you install the latest debug symbol files, the Visual Studio debugger may report the same error. This occurs if you have installed a Microsoft application that updates core system files, such as COMCTL32.DLL or OLE32.DLL, to versions that are newer than the operating system version or service pack for which you have installed symbols.