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NS_S_WMPBR_PARTIALSUCCESS
Windows Media backup or restore completed with limitations
NS_S_WMPBR_PARTIALSUCCESS is HRESULT 856374 (0x000D1136) from Windows Media. The documented description is “Transfer complete with limitations.” In the Windows Media Player, Windows Media Format, DRM, or Media Foundation state machine, the value reports a nonfailure state that must not be collapsed into plain S_OK.
Wrappers should not translate this result to an undifferentiated Boolean before state handling finishes.
Where the status is encountered
- Windows Media Format source, writer, DRM, publishing-point, or installation operations;
- Media Foundation topology activation and remote-component setup;
What must be true before accepting it
Verify that the successful subset and every omitted or degraded item are known before the user relies on the backup or restored state. Without the boundary check, the HRESULT can hide stale output, pending ownership, or omitted work.
Correct handling and recovery
Preserve the usable output, enumerate limitations, and retry only affected items after correcting their specific cause. Do not overwrite the last complete backup with an unqualified partial set.
Continuation after it within the documented state machine is different from restarting the entire operation.
Difference from nearby results
This is not complete backup success and not total failure; it requires a per-item reconciliation path.
Practical scenario
A restore recovers most licenses but skips two expired entries. The application lists them, retains the previous backup, and marks the new restore as partial.
References
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