| Previous | Next |
| NS_S_WMP_UI_VERSIONMISMATCH | NS_S_WMP_LOADED_GIF_IMAGE |
NS_S_WMP_EXCEPTION
Windows Media Player UI component reported an exception
NS_S_WMP_EXCEPTION is HRESULT 856041 (0x000D0FE9) from Windows Media. AllStat describes it as “An error occurred in one of the UI components.” The severity bit indicates a nonfailure result, but the value carries a specific condition that must not be collapsed into plain S_OK.
In the legacy Windows Media pipeline or Player state, this result means that an error occurred in one of the UI components. Ordinary completion must not be inferred from it until the owning component’s state and outputs agree.
What must be true before accepting it
Verify that the exception is isolated and the player state remains coherent before the application continues. Only this contract check establishes that this result is safe for the caller’s next step.
The return of this result can follow observable side effects, so recovery begins with state reconciliation.
Where the status is encountered
- This result can be returned during Windows Media source, reader, writer, or renderer callbacks; log the exact method and object state instead of interpreting the constant outside that contract.
- It can be returned during Windows Media Player SDK automation; log the exact method and object state instead of interpreting the constant outside that contract.
- It can be returned during media graph, playlist, image, rights, or buffering state; log the exact method and object state instead of interpreting the constant outside that contract.
Because it is informational, a language binding may expose it as success and hide the symbolic distinction. Keep the original HRESULT available until the code-specific branch has run.
Evidence and telemetry
- preserve UI component or plug-in identity.
- preserve exception code and stack.
- preserve current player state.
- preserve user command in progress.
- preserve fallback or component unload result.
Also record ns_s_wmp_exception_operation, ns_s_wmp_exception_state_before, ns_s_wmp_exception_state_after, UTC time, process and thread identifiers, component version, and a correlation ID. For privacy-safe it diagnostics, log metadata and fingerprints instead of confidential source values.
Correct handling and recovery
Capture the component, exception details, and current UI operation. Reset or unload the affected component, and restart the player surface if state cannot be proved valid.
Retry it only when a documented input or state has changed. Before another call following it, confirm that completed side effects are idempotent or reconciled.
Practical scenario
A visualization component throws while changing views. The host unloads it, restores the standard view, and preserves playback instead of ignoring the exception.
A regression test should reproduce it, assert the relevant outputs and state, then change only the decisive condition and verify the expected neighboring result or ordinary completion.
Difference from nearby results
It must be distinguished from ordinary S_OK and from failure-severity values in the same API family; its documented state changes control the next action.
A nearby HRESULT can change object ownership, output validity, or the permitted next method.
References
- Microsoft: Windows Media Format SDK error codes — official Microsoft material used to interpret it.
- Microsoft: Windows Media Player SDK
- Microsoft: Windows Media Player buffering event
- Microsoft: HRESULT values
Looking for a different code? Search another status or error code.