What does HRESULT 0xC00D1089 (NS_E_WMPCORE_UNRECOGNIZED_MEDIA_URL) mean?

Status / error code:

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Constant name:

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Description:

Windows Media Player cannot find the specified file. Verify the path is typed correctly. If it is, the file does not exist in the specified location, or the computer where the file is stored is not available.%0

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NS_E_WMPCORE_NOBROWSER	NS_E_WMPCORE_GRAPH_NOT_IN_LIST

NS_E_WMPCORE_UNRECOGNIZED_MEDIA_URL

Diagnosing `NS_E_WMPCORE_UNRECOGNIZED_MEDIA_URL`

Windows Media Player reports this result (0xC00D1089) when the supplied media URL cannot be interpreted as a supported path/protocol target. The playback core unrecognized media URL condition is owned by the core that resolves Player.URL, selects or builds a playback graph, chooses codecs and devices, prerolls media and advances between playlist items while reporting asynchronous errors.

Evidence that separates the result

Field	What to record
Decisive check	Record exact URL, scheme, escaping and final redirect or path resolution
Artifact identity	Audio/video device identity and driver generation for this reproduction
Runtime state	Ordered ErrorItem queue with errorCode, errorContext and media object for this reproduction
Owning object	Player.URL, current media sourceURL and resolved final URL for this reproduction
Lower-level result	Play state and transition immediately before failure for this reproduction
Correlation	Selected graph/source/filter or codec identity and version for this reproduction

Representative case: An application passes an unescaped local path as though it were a URL. The example isolates only the producing component.

Nearby results with different boundaries

Result	Different boundary
`NS_E_WMPCORE_GRAPH_NOT_IN_LIST`	The requested preroll/playback graph is not present in the core’s current graph list
`NS_E_WMPCORE_NOBROWSER`	WMP cannot invoke the browser required for a web-help or related URL action
`NS_E_WMPCORE_WEBHELPFAILED`	The Player could not open the Web Help target associated with an error or command

Verification

Repeat the original operation with a fresh owning object after the identified precondition is corrected. Treat this result as resolved only when that same operation passes this stage; preserve any later HRESULT as a separate failure.

Technical references

Windows Media Player SDK — documentation used to identify the producing boundary of this result.
Player MediaError event — normative or platform material relevant to it.
ErrorItem object — API or format context for this HRESULT.
Supported protocols and file types It.

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