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NS_E_METADATA_IDENTIFIER_NOT_AVAILABLE
Diagnosing NS_E_METADATA_IDENTIFIER_NOT_AVAILABLE in the Windows Media pipeline
This result (0xC00D32DD) is returned at the content identifier needed to correlate metadata is absent. It identifies the failing metadata operation, so troubleshooting should begin with the object and operation that own that checkpoint rather than with a broad player reset.
Where the failure occurs
At that metadata stage, the component has already accepted the earlier prerequisites but cannot cross the boundary described as the content identifier needed to correlate metadata is absent. That distinction matters: success in opening the file, resolving the host or creating a COM object does not prove that this later operation is valid at this checkpoint.
The strongest reproduction is enumerate available attributes and identifiers for the same file and stream before requesting the missing item by its exact key. If the same call advances after that single change, the evidence supports this boundary. If it does not, return to the first nested error rather than widening the repair.
Attribute, schema and locale evidence
| Capture | Why it matters |
|---|---|
| Owning call | Record the API method, object identity, thread or callback and timestamp for the reported boundary. |
| Decisive values | File or content identifier, metadata provider, stream number, attribute name and type, locale, read/edit capability and the first metadata API result in the diagnostic record. |
| Object generation | Note when the reader, writer, graph, URL object, streaming session or metadata provider was created; stale state can reproduce this result after configuration has changed. |
| First nested result | Keep the earliest codec, COM, socket, DNS, parser or provider status before this result; later UI messages are less specific. |
| Comparison case | Use one known-good resource that exercises the same metadata check while changing only the rejected precondition. |
Read-only metadata experiment
- Log
0xC00D32DD, it, the exact operation and the first failure time during a controlled retest. - Preserve file or content identifier, metadata provider, stream number, attribute name and type, locale, read/edit capability and the first metadata API result.
- Do not reuse a graph, session, reader or metadata object created before the relevant configuration or resource changed before retrying.
- Perform one isolated test: enumerate available attributes and identifiers for the same file and stream before requesting the missing item by its exact key in the diagnostic record.
- Repeat through the same API and protocol path; a different player or local-copy test is useful only as a comparison, not as proof that the metadata operation is fixed.
- Confirm the expected next state and retain any new HRESULT as a separate downstream result at this checkpoint.
Interpret the provider response
| Retest result | Interpretation |
|---|---|
| The identical call still returns the code | The values governing the original request are unchanged, or the caller is still using an older object generation. |
| A fresh object succeeds | Lifetime or cached state contributed to it; correct object recreation instead of applying a machine-wide workaround during a controlled retest. |
| The call advances to another HRESULT | the recorded metadata state boundary was cleared. Diagnose the new code at its own format, graph, URL, network or metadata stage before retrying. |
| Only one resource fails | The evidence favors content, URL, publishing point, stream, attribute or object-specific state rather than a global outage in the diagnostic record. |
Nearby results are not interchangeable
Main distinction: provider unavailability differs from a cache miss, which says only that the offline copy is absent when isolating this failure.
| Nearby HRESULT | How to compare it |
|---|---|
NS_E_METADATA_CACHE_DATA_NOT_AVAILABLE | The offline or local metadata cache has no matching item |
NS_E_METADATA_INVALID_DOCUMENT_TYPE | The metadata document type does not match the handler expected for the operation |
NS_E_METADATA_CANNOT_RETRIEVE_FROM_OFFLINE_CACHE | Offline mode was selected but the cache cannot supply the requested metadata |
Misleading actions
- Deleting metadata caches or tags before preserving the provider, attribute key, type and locale that produced the result.
- Do not erase the first occurrence by repeatedly retrying; callbacks and reconnects can replace the useful state with a later wrapper error before retrying.
- Do not publish credentials, protected-content material or complete private URLs in the diagnostic record. Record redacted identifiers, lengths, hashes and protocol fields needed to reproduce the original boundary.
Technical references
- Windows Media metadata features
- Retrieving metadata attributes
- Setting metadata attributes
- Metadata editor object
- Microsoft HRESULT registry
Close the incident only after the original the operation succeeds on a current object and the expected next state is observed at this checkpoint.
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