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NS_E_NO_CD
Practical scope of NS_E_NO_CD
This HRESULT is produced at testing whether the selected optical drive currently contains readable media. This result belongs to audio-cd discovery, digital reading and ripping, not to an undifferentiated “Windows Media problem.”
Pipeline position
At the checkpoint, windows Media Player identifies the inserted medium, reads its table of contents, creates a CD reader, and then chooses digital audio extraction or an analog playback path; Ripping adds destination-path creation and an encoder selected from the user’s rip settings. The page-specific boundary is testing whether the selected optical drive currently contains readable media.
Recognition of the drive does not prove that usable audio sectors, a stable digital-read path or a valid rip destination are available. In a typical failing run, a stale drive selection remains after the user moved the disc to another tray.
Reproduction record
| Evidence | Why it matters for no cd |
|---|---|
| Producing object and operation | physical drive identifier, media-change generation, disc and track number, table-of-contents result, digital/analog mode, error-correction flag, read speed, rip state, output format and first lower-level drive error |
| Decisive observation | drive identity, tray/media-present state, media-change counter and the disc seen by the same IWMPCdrom object |
| Generation identity | Record the same disc, device, job or Player operation generation that returned this result; a reconnect or media change creates a different test. |
| Underlying result | Keep the first device, filesystem, COM, codec, DirectShow, IMAPI or BITS result seen before the Player mapped it to this result. |
| Controlled comparison | Repeat the producing call after changing only this condition: insert the intended disc and refresh the same drive object after the media-change notification. |
Reading the evidence
| Observation | Interpretation |
|---|---|
| The recorded values match the boundary | The result is consistent with testing whether the selected optical drive currently contains readable media; correct that state before changing unrelated codecs, drivers or playlists. |
| A lower layer failed before this result | Preserve that earlier HRESULT or device result because it may be only the Player-level mapping. |
| The same call passes after one isolated change | The comparison supports the no cd diagnosis rather than a broad installation failure. |
| The code changes after retesting it | The boundary was passed; diagnose the new HRESULT as the next independent stage. |
It scopes the failure to testing whether the selected optical drive currently contains readable media.
Verification procedure
- Capture
0xC00D0FA0, it, the exact Player/API operation and the first timestamp at which it appears. - Save drive identity, tray/media-present state, media-change counter and the disc seen by the same IWMPCdrom object; do this before ejecting media, reconnecting a device, canceling a job or rebuilding the Player object.
- correlate the result with physical drive identifier, media-change generation, disc and track number, table-of-contents result, digital/analog mode, error-correction flag, read speed, rip state, output format and first lower-level drive error.
- Reproduce once with the original source and destination, then apply only this change: insert the intended disc and refresh the same drive object after the media-change notification.
- Create a fresh operation generation and verify that the original call advances beyond the no cd boundary.
Results that may look similar
| Related result | Different diagnostic boundary |
|---|---|
NS_E_8BIT_WAVE_UNSUPPORTED | validating PCM precision before an audio-CD track is staged |
NS_E_CANT_READ_DIGITAL | opening the digital-audio extraction path for CD playback |
NS_E_SLOW_READ_DIGITAL | maintaining digital playback throughput without underrun |
Change the smallest responsible condition
The targeted action is to insert the intended disc and refresh the same drive object after the media-change notification. While retesting it, keep unrelated media, device, playlist and network values unchanged.
When verifying it, do not polish the disc, change the driver, switch read modes and change the rip format in one test; preserve the first failing track and alter one boundary at a time.
References
- About CD Ripping.
- Windows Media Player object model.
- IDiscRecorder2::DisableMcn and media-change notification.
- WAVEFORMATEX structure.
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