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NS_E_WMP_FILESCANALREADYSTARTED
How to classify this WMP result
0xC00D0FBE maps to NS_E_WMP_FILESCANALREADYSTARTED. Its actionable interpretation is a library file-scan generation is already active within the Windows Media Player library and media database; the producing mechanism is the library layer that records media paths, creates Media objects, scans folders, resolves object identifiers and coordinates shared-library requests.
An additional test is to record scan roots, start time, progress and the caller attempting the second scan; that evidence is more useful than reinstalling the Player or changing several unrelated settings at once.
How this layer works
The file scan already started workflow must be separated from a generic WMP failure: adding an item to the library does not move the underlying file, and a library row can survive after its path or shared object becomes unavailable. It also matters that a scan, search or Home Media Experience request is stateful, so stale identifiers and overlapping operations must be separated from file-format failures.
Representative case for file scan already started: Two UI actions schedule overlapping scans of the same monitored folders.
Evidence to capture before retry
| Field | What to record |
|---|---|
| What to verify | Record scan roots, start time, progress and the caller attempting the second scan |
| Artifact identity | Scan/search generation and the request that superseded it for this reproduction |
| Runtime state | First library or file-system HRESULT before the Player-level summary for this reproduction |
| Owning object | Library type, database identity and user profile owning the operation for this reproduction |
| Lower-level result | Canonical local/UNC/URL path and file identity for this reproduction |
| Correlation | Media object ID or HME container/item ID for this reproduction |
Why the symbolic name matters
| Result | Different condition |
|---|---|
NS_E_WMP_HME_INVALIDOBJECTID | The Home Media Experience object identifier no longer resolves in the current shared-library view |
NS_E_WMP_HME_NOTSEARCHABLEFORITEMS | The selected HME container does not advertise item-search capability |
NS_E_WMP_HME_STALEREQUEST | The HME request belongs to an older library or navigation state |
A focused diagnostic sequence
- Find the first component that returned this result and label that event as the failure point.
- Freeze the input and object identity associated with the failing operation before WMP fallback or cleanup changes it.
- Reconstruct the immediately preceding successful state, then identify the call or event that crossed into failure.
- Perform the code-specific test: record scan roots, start time, progress and the caller attempting the second scan.
- Make the targeted change—wait for or cancel the current scan before starting a distinct generation—and repeat the same producing operation.
Correct the producing condition
Resolve this result where the relevant state is produced: wait for or cancel the current scan before starting a distinct generation. After correction, reload or recreate the owning object so cached failure state is not mistaken for a successful repair.
- Avoid deleting the entire media database before exporting the failing object IDs and paths; it can destroy the artifact or state needed to explain this result.
- Avoid assuming a successful file open proves that the library record and sharing view are current; that can replace the original HRESULT with a secondary failure from another layer.
Regression check
Repeat the action that returned this HRESULT and verify that the same object passes the former failure point. Success means reaching the next expected load, parse, playlist, control or playback state—not merely suppressing a dialog.
Technical references
- Accessing the library programmatically — normative or platform material relevant to this HRESULT.
- MediaCollection object — API or format context.
- MediaCollection. Add method — documentation for this HRESULT.
- Error handling in the WMP object model
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