ERROR_NET_OPEN_FAILED - 570 (0x23A)
The NtCreateFile API failed. This error should never be returned to an application, it is a place holder for the Windows Lan Manager Redirector to use in its internal error mapping routines.
Updated: Feb 21, 2026
Technical Meaning
The ERROR_NET_OPEN_FAILED error code, with a numeric value of 570 and a hexadecimal representation of 0x23A, is returned when the NtCreateFile API fails. This error is specifically used by the Windows Lan Manager Redirector for internal error mapping routines.
Error Details
This error should not be directly exposed to applications, as it serves an internal purpose within the system. It indicates that a file operation initiated through the NtCreateFile API has failed, but does not provide specific details about why the failure occurred.
Usage Context
The ERROR_NET_OPEN_FAILED is primarily used in scenarios where networked file operations are involved. This error can be encountered when attempting to open files or directories on a remote system via the Lan Manager Redirector.
Developer Interpretation
Developers should interpret this error as an indication that a file operation has failed, but without specific details about the cause. The exact reason for the failure is not exposed through this error code and may require further investigation to determine the underlying issue.
Related Errors
FAQ
Q: What does ERROR_NET_OPEN_FAILED indicate?
A: It indicates a failure in the NtCreateFile API call by the Windows Lan Manager Redirector, but it does not provide specific details about the cause.
Q: Can this error be used to diagnose network issues?
A: While it may indicate a network-related issue, more detailed diagnostics are required to pinpoint the exact problem.
Summary
The ERROR_NET_OPEN_FAILED (570) is an internal error code used by the Windows Lan Manager Redirector for file operations. It should not be directly exposed to applications and does not provide specific details about the cause of failure. Developers should interpret this error as a general indication that a file operation has failed, requiring further investigation.