HRESULT 0xC00D10BF (NS_E_PLAYLIST_CONTAINS

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Description:

Windows Media Player cannot play one or more files.  For additional information, right-click an item that cannot be played, and then click Error Details.%0

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NS_E_DISPLAY_MODE_CHANGE_FAILED	NS_E_CHANGING_PROXY_NAME

NS_E_PLAYLIST_CONTAINS_ERRORS

Diagnosing NS_E_PLAYLIST_CONTAINS_ERRORS in Player settings or the playback graph

NS_E_PLAYLIST_CONTAINS_ERRORS (0xC00D10BF) is returned when a playlist loaded as a container but at least one child item produced an error.

For NS_E_PLAYLIST_CONTAINS_ERRORS, separate Network-object configuration, graph capabilities, graphics presentation, stream selection and COM ownership before changing playback content. For NS_E_PLAYLIST_CONTAINS_ERRORS, record what the Player had already completed because later retries often replace the original evidence. The specific rejected condition is a playlist loaded as a container but at least one child item produced an error.

Configuration or graph boundary

AllStat already supplies the standard user-facing description for NS_E_PLAYLIST_CONTAINS_ERRORS; 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 NS_E_PLAYLIST_CONTAINS_ERRORS operation is valid.

Case-specific checkpoint: per-item HRESULTs, item URLs, index order, rollover choices and whether valid entries continue playing. The controlled comparison for NS_E_PLAYLIST_CONTAINS_ERRORS is: build a new list from only the first failing item and reproduce its own HRESULT directly.

Closest distinction: NS_E_WMP_MULTIPLE_ERROR_IN_PLAYLIST summarizes several queued failures; this code can also accompany a partially usable list.

State to capture before changing settings

Capture	Why it matters for `NS_E_PLAYLIST_CONTAINS_ERRORS`
Object or resource	per-item HRESULTs, item URLs, index order, rollover choices and whether valid entries continue playing
State snapshot	Record the Player openState/playState or operation phase, object identity and exact timestamp when NS_E_PLAYLIST_CONTAINS_ERRORS was returned.
First lower result	Keep the earliest Win32, Winsock, COM, parser, codec, DRM or device result that appears before NS_E_PLAYLIST_CONTAINS_ERRORS.
Comparison record	For NS_E_PLAYLIST_CONTAINS_ERRORS, use one known-good case that follows the same API, protocol and component path while changing only the rejected precondition.

One-variable verification

Start from the original call and log 0xC00D10BF together with its object and operation phase.
Collect per-item HRESULTs, item URLs, index order, rollover choices and whether valid entries continue playing before changing the machine.
Use this single-variable test: build a new list from only the first failing item and reproduce its own HRESULT directly.
For NS_E_PLAYLIST_CONTAINS_ERRORS, repeat on a fresh object if the original predates a configuration, device or resource change.
For NS_E_PLAYLIST_CONTAINS_ERRORS, validate the expected next operation, not just initial open or object creation.

Reading the next state

Retest outcome	Interpretation
Same NS_E_PLAYLIST_CONTAINS_ERRORS on the same object	For NS_E_PLAYLIST_CONTAINS_ERRORS, 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 NS_E_PLAYLIST_CONTAINS_ERRORS.
A later HRESULT appears	The rejected condition — a playlist loaded as a container but at least one child item produced an error — was cleared for NS_E_PLAYLIST_CONTAINS_ERRORS; diagnose the new code at its own layer.
Only one item or endpoint fails for NS_E_PLAYLIST_CONTAINS_ERRORS	For NS_E_PLAYLIST_CONTAINS_ERRORS, the evidence favors resource-specific data, rights, routing or device state rather than a global Player failure.

Actions that obscure the cause

treating the aggregate HRESULT as the root cause for every item.
Do not discard the first NS_E_PLAYLIST_CONTAINS_ERRORS occurrence by repeatedly invoking Play, open, save or retry; later events can replace its original state.
For NS_E_PLAYLIST_CONTAINS_ERRORS, do not publish credentials, private URLs, license material or complete protected-content headers; retain only redacted identifiers, lengths, hashes and protocol fields.

Technical references

Retain before-and-after evidence for NS_E_PLAYLIST_CONTAINS_ERRORS so object recreation or content replacement is not mistaken for random retry success.

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