Exception code: 0xc00000fd

    General discussion

  • Scenario
    We have site in ASP.NET (C#) which gives call to Win32 dll (with MFC used - Native code). It works in debug mode. But when i used the same dll with published site, i get following exception.

    Used P/Invoke to call functions from Win32 dll

    Everything works fine if buffer length is kept low like - 
    TCHAR users[BUFSIZE] = {'0'}; where BUFSIZE = 9999 

    If we increase BUFSIZE = 99999, w3wp.exe crashes hard.

    Any clues how can this be fixed?


    Following exception is thrown.
    Faulting application name: w3wp.exe, version: 7.5.7600.16385, time stamp: 0x4a5bcd2b
    Faulting module name: PTLicenseMgmnt.dll, version:, time stamp: 0x4c378b13
    Exception code: 0xc00000fd
    Fault offset: 0x00019bf7
    Faulting process id: 0x%9
    Faulting application start time: 0x%10
    Faulting application path: %11
    Faulting module path: %12
    Report Id: %13
    Friday, July 09, 2010 9:07 PM

All replies

  • I'm guessing you are defining BUFSIZE as an Int32?  If the win32.dll expects an integer, than it's actually expecting a 16-bit integer, and not a 32-bit integer.

    When BUFSIZE = 9999, this value is less than the maximum size of a 16-bit value of 32,767.

    When BUFSIZE = 99999, this value is greater than the maximum size of a 16-bit value of 32,767.

    EDIT:  After re-reading where you using BUFSIZE, I see that it's for defining an array.  I'm thinking that the maximum size the P/Invoke method will accept for that array is an array size that does NOT exceed the 16-bit value, so Int16.

    Hope this helps :)

    Monday, July 12, 2010 6:39 PM
  • The code works for both 9999 and 99999 in debug mode.

    Works with C# .Net dll

    Works with ASP.NET.


    Problem occurs with release mode and published site.

    Any clues?




    Monday, July 12, 2010 7:07 PM
  • With some code changes I am able to pass on stringbuilder with buffer of 99999 to win 32 dll.

    Actual issue occurs if i have that much buffer inside function using registry functions


    I am sure I am missing something .... do not what is that.





    Tuesday, July 13, 2010 3:08 PM