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NS_E_FILE_FAILED_CHECKS
How to classify this WMP result
NS_E_FILE_FAILED_CHECKS is HRESULT 0xC00D0FCD. At this checkpoint it means the file fails the Player library admission checks before it can be added; the result belongs to WMP file download, save and package persistence, not to an unspecified Player failure.
An additional test is to record the admission rule, file type, path and first validation result rather than only the add operation; that evidence is more useful than reinstalling the Player or changing several unrelated settings at once.
How to prove the condition
- Preserve
0xC00D0FCD, the ErrorItem context and the object generation involved in file failed checks. - Compare the failing file failed checks artifact with a known-good artifact that differs only in the suspected property.
- Separate acquisition, parsing, object construction, playback and persistence until the owner of file failed checks is clear.
- Confirm the failure directly: record the admission rule, file type, path and first validation result rather than only the add operation.
- After you correct the property that fails admission or leave the unsupported file outside the library, recreate the owning WMP object and verify that the corrected generation completes.
Minimum useful incident record
Capture state before Player cleanup:
- Decisive check: record the admission rule, file type, path and first validation result rather than only the add operation.
- Artifact: file attributes, owner, ACL and sharing handles.
- State: bytes received/written, expected length and final hash.
- Object identity: original URL/path and final redirected or canonical location.
- Underlying evidence: HTTP status/content type or local CreateFile-style access outcome.
- Correlation: destination directory, temporary file and final rename/replace result.
Log paths, hashes, IDs, offsets, and HRESULTs. Exclude secrets and unrelated content from logs.
Why the producing component matters
Before changing state, remember that download, parse and save are separate stages: a successful HTTP response does not prove that the payload is valid or that the destination can be committed. A second platform rule is that read-only attributes, sharing modes, redirected paths and streamed sources can prevent persistence even when playback succeeds.
Representative case: A readable file is rejected during library validation even though ordinary filesystem access succeeds. The example isolates only the producing component.
A narrow remediation path
Change the responsible precondition rather than masking the symptom: correct the property that fails admission or leave the unsupported file outside the library. A retry is meaningful only after that recorded condition changes.
- Avoid retrying save under a new name without recording the failing destination and access mode; it can destroy the artifact or state needed to explain this result.
- Avoid treating a downloaded error page as a valid playlist, skin or media package; that can replace the original HRESULT with a secondary failure from another layer.
Neighboring codes to separate
| Result | Different boundary |
|---|---|
NS_E_DAMAGED_FILE | The media parser identifies structural corruption in a file selected for use |
NS_E_SHARING_VIOLATION | Another handle’s sharing mode prevents the required WMP file access |
NS_E_WMP_RECORDING_NOT_ALLOWED | The selected content rights do not permit the requested recording or burn action |
If this result is followed by a broader “cannot play,” “cannot load,” or “operation failed” result, preserve the earlier event. The later code can be a consequence from a wrapper, fallback item or UI layer rather than the producing failure.
Completion criteria
Keep one fixture that reproduces 0xC00D0FCD and one corrected fixture that changes only the identified precondition. This condition correction is complete when the intended operation succeeds without being replaced by a neighboring WMP HRESULT.
A representative failure pattern
Use this result, 0xC00D0FCD and the symbolic phrase in traces. Correlate search keys with API and object.
Technical references
- Supported protocols and file types — API or format context for it.
- File name extensions — documentation used to identify the producing boundary of this result.
- Windows Media Player SDK — normative or platform material relevant to this result.
- Error handling in the WMP object model
Looking for a different code? Search another status or error code.