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ERROR_OPEN_FAILED
The open request failed without a narrower Win32 reason
ERROR_OPEN_FAILED indicates that the system could not open the requested file, directory, or device. Causes can include an inaccessible target, unsuitable open flags, device state, sharing constraints, or a lower-level driver failure.
What to capture
- Record the normalized path, desired access, share mode, disposition, and flags.
- Check whether the target exists and is the expected object type.
- Inspect device and system logs when opening hardware or special files.
- Confirm that a wrapper did not discard a more specific preceding error.
Recovery
Adjust the open parameters only after identifying the mismatch. Repeatedly reopening can be appropriate for a transient device transition, but not for a permanent policy or path problem. Show the user the target involved without exposing sensitive credentials embedded in a URI.
References
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