Error Code 0x00000040

Error Code 0x00000040

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The “TARGET_MDL_TOO_SMALL” stop error (0x00000040) is a Blue Screen of Death (BSOD) error related to a Memory Descriptor List (MDL), which is used by the Windows kernel to manage virtual memory. This error typically arises in the context of software development when a program attempts to create an MDL (using the IoBuildPartialMdl function) that is smaller than the original MDL.

How to fix:

  1. Debugging: As this is an issue that commonly appears during software development, your first step should be to debug your program. Look closely at where and how you’re using the IoBuildPartialMdl function, and make sure that the target MDL is not smaller than the source MDL.
  2. Driver Updates: The issue could potentially be related to system drivers. Ensure that all your drivers, especially those related to hardware you’re working with, are up-to-date.
  3. Windows Updates: Keep your system updated with the latest Windows updates, as they often include patches for various issues.
  4. Professional Help: If you’re unable to resolve the issue, you might consider reaching out to a professional or to a developer community for help.

Remember, this is a low-level system error that typically isn’t encountered by users who aren’t doing systems-level programming or driver development. Always take caution when dealing with system-level tasks to avoid further issues.

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