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NS_E_FILE_PLAY_FAILED
NS_E_FILE_PLAY_FAILED — 0xC00D0020
Diagnosing this result
This result identifies this Windows Media Services boundary: unable to play a file.
Why this boundary matters
This HRESULT is tied to one concrete file operation. Preserve the canonical path, service identity, access and sharing mode, requested offset or allocation, and the first native filesystem/storage result; a later server HRESULT can hide the original failure.
Evidence to collect
| Field | What to preserve |
|---|---|
| Object | Canonical path or server-side file identity plus the exact open/read/write/allocate operation. |
| Security | Service account, desired access and sharing mode used by that operation. |
| Extent | Offset or allocation size, requested byte count and completed byte count where applicable. |
| Native result | The first filesystem/storage error returned before Windows Media maps it to this HRESULT. |
Decision rule
A path that exists is not enough: success requires the same service identity to complete the same file operation with the expected size and sharing semantics.
Focused test
Preserve the file-open result, selected parser/source, stream formats and first playback-stage error. Verify whether the same file opens successfully but fails only when streaming begins.
Verification
Repeat the same file operation under the same service identity and against the same object. Require the requested open/read/write/allocation to complete with the expected byte count or state; a different native result is a new diagnostic boundary.
Technical references
- System playlist parser plug-ins
- Using URL and server rollover
- Windows Media protocol glossary
- Microsoft HRESULT values for the Windows Media namespace
The useful success criterion is not merely the disappearance of this result. Confirm that the same server action completes and that the expected content or object remains available through the next pipeline stage.
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