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NS_E_WMPBR_NAMECOLLISION
Diagnosing NS_E_WMPBR_NAMECOLLISION during Windows Media rights backup or connectivity
NS_E_WMPBR_NAMECOLLISION (0xC00D1134) is returned when the backup destination would overwrite or conflict with an existing backup artifact.
Preserve one asynchronous operation record containing the selected path, event listener, network resource and license-store status. Here, the decisive boundary is the backup destination would overwrite or conflict with an existing backup artifact. This result is most useful when treated as a Player checkpoint, not as a recommendation to reinstall everything.
Backup/restore boundary
AllStat already supplies the standard user-facing description for this HRESULT; this custom block instead isolates the additional technical boundary. Earlier success in file lookup, network connection, parser creation or graph construction does not prove that the later the operation is valid.
Case-specific checkpoint: destination directory listing, generated names, volume case rules, prior partial sets and operation ID. The controlled comparison for this HRESULT is: select a new empty directory and verify that no file is created before the backup begins.
Closest distinction: NS_E_WMPBR_BACKUPCANCEL records cancellation; a collision is a precondition failure at destination naming.
Preserve the operation record
| Capture | Why it matters for this HRESULT |
|---|---|
| Object or resource | destination directory listing, generated names, volume case rules, prior partial sets and operation ID |
| State snapshot | Record the Player openState/playState or operation phase, object identity and exact timestamp when this result was returned. |
| First lower result | Keep the earliest Win32, Winsock, COM, parser, codec, DRM or device result that appears before this result. |
| Comparison record | Use one known-good case that follows the same API, protocol and component path while changing only the rejected precondition. |
Safe controlled retry
- Record
0xC00D1134, this result, the exact method or command and the first failure time. - Preserve destination directory listing, generated names, volume case rules, prior partial sets and operation ID.
- Perform one isolated comparison: select a new empty directory and verify that no file is created before the backup begins.
- Repeat the original Player path after it and keep any new HRESULT as a downstream result.
- confirm the expected state transition rather than only disappearance of the dialog.
Interpreting completion
| Retest outcome | Interpretation |
|---|---|
| Same it on the same object | The governing state or value is unchanged, or the caller is reusing an object created before the relevant change. |
| Fresh object succeeds | Lifetime, cached configuration or stale playlist/graph state contributed to it. |
| A later HRESULT appears | The rejected condition — the backup destination would overwrite or conflict with an existing backup artifact — was cleared for this HRESULT; diagnose the new code at its own layer. |
| Only one item or endpoint fails for this HRESULT | The evidence favors resource-specific data, rights, routing or device state rather than a global Player failure. |
Actions that obscure the cause
- renaming individual files inside an existing DRM backup set.
- Do not discard the first occurrence by repeatedly invoking Play, open, save or retry; later events can replace its original state.
- do not publish credentials, private URLs, license material or complete protected-content headers; retain only redacted identifiers, lengths, hashes and protocol fields.
Technical references
- Backing up and restoring DRM licenses
- Backing up and restoring licenses
- Windows Media DRM client interfaces
- WM_BACKUP_RESTORE_STATUS
- Microsoft HRESULT registry
Close it only when the original operation crosses this boundary and reaches the expected next Player state.
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