ERROR_NOTIFY_CLEANUP - 745 (0x2E9)
This indicates that a notify change request has been completed due to closing the handle which made the notify change request.
Updated: Feb 21, 2026
Technical Meaning
The ERROR_NOTIFY_CLEANUP error code, with the numeric value of 745 and the hexadecimal representation of 0x2E9, is returned by certain Windows API functions when a notify change request has been completed due to closing the handle that initiated the request. This indicates that the system has processed the notification changes up until the point where the associated handle was closed.
Error Details
This error code is specific to operations involving file or directory monitoring through the FindFirstChangeNotification and related functions. When a client application closes the handle returned by these functions, the operating system processes any pending notifications before returning this error code to indicate that the notify change request has been completed.
Usage Context
The ERROR_NOTIFY_CLEANUP is typically encountered in scenarios where an application is monitoring changes to files or directories using the Windows Change Notification API. The handle returned by functions such as FindFirstChangeNotification remains open until explicitly closed by the application, at which point this error code may be generated.
Developer Interpretation
Developers should interpret this error code as a confirmation that all pending notifications have been processed and that the notify change request has been properly terminated. This is useful for ensuring that applications handle changes to monitored files or directories correctly before closing their handles, thus avoiding potential data inconsistencies or missed events.
Related Errors
ERROR_NOTIFY_ENUM_DIR(1206, 0x4B2): Indicates that a directory enumeration operation has been completed.ERROR_HANDLE_EOF(38, 0x26): Indicates the end of file on a handle.ERROR_BROKEN_PIPE(109, 0x6D): Indicates an I/O error due to a broken pipe or handle closure.
FAQ
Q: What does ERROR_NOTIFY_CLEANUP mean?
A: It indicates that the notify change request has been completed due to closing the associated handle.
Q: How should I handle this error in my application?
A: Ensure that your application processes all pending notifications before closing the handle, and use this error code as a confirmation that the operation is complete.
Summary
The ERROR_NOTIFY_CLEANUP error code is a specific indication of the completion of a notify change request due to the closure of the associated handle. Developers should understand its context within file or directory monitoring operations and ensure proper handling to avoid data inconsistencies.