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.

Separate Network-object configuration, graph capabilities, graphics presentation, stream selection and COM ownership before changing playback content. 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 it; 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: per-item HRESULTs, item URLs, index order, rollover choices and whether valid entries continue playing. The controlled comparison for it 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 it
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 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.

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.
repeat on a fresh object if the original predates a configuration, device or resource change.
validate the expected next operation, not just initial open or object creation.

Reading the next state

Retest outcome	Interpretation
Same this result 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 this result.
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 it; diagnose the new code at its own layer.
Only one item or endpoint fails for it	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 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

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

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