What does HRESULT 0xC00D115D (NS_E_WMP_CONVERT_PLUGIN_UNAVAILABLE_NOERRORURL) mean?

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Constant name:

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Operating System:

Description:

Windows Media Player cannot add the file to the library. The plug-in required to add the file is not installed properly. For assistance, contact the company that provided the file.%0

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NS_E_WMP_CONVERT_PLUGIN_UNAVAILABLE_ERRORURL	NS_E_WMP_CONVERT_PLUGIN_UNKNOWN_FILE_OWNER

NS_E_WMP_CONVERT_PLUGIN_UNAVAILABLE_NOERRORURL

Diagnosing NS_E_WMP_CONVERT_PLUGIN_UNAVAILABLE_NOERRORURL during Windows Media library import

NS_E_WMP_CONVERT_PLUGIN_UNAVAILABLE_NOERRORURL (0xC00D115D) is returned when the required import/conversion plug-in cannot be loaded and no provider URL can be offered.

Identify whether library insertion reached path validation, type detection, plug-in activation, rights evaluation or database update. This result identifies a narrower stage than the dialog text exposes, so preserve its operation before trying a workaround. In this case the rejected checkpoint is the required import/conversion plug-in cannot be loaded and no provider URL can be offered.

Library-import 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: selected handler, extension and MIME type, COM registration, bitness, loader error and dependency chain. The controlled comparison for it is: use a known file owned by the same handler and trace CoCreateInstance plus module loading.

Closest distinction: NS_E_WMP_CONVERT_PLUGIN_UNKNOWN_FILE_OWNER means the Player cannot even identify who owns the file type.

Handler and source evidence

Capture	Why it matters for it
Object or resource	selected handler, extension and MIME type, COM registration, bitness, loader error and dependency chain
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.

Controlled import comparison

Freeze the current object state and collect selected handler, extension and MIME type, COM registration, bitness, loader error and dependency chain.
Reproduce this result once without automatic retries or fallback applications.
Change only one precondition: use a known file owned by the same handler and trace CoCreateInstance plus module loading.
compare the first nested status and next Player event with the failed run.
After testing it, restore the original configuration if the change was diagnostic only.

Interpreting the library result

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 required import/conversion plug-in cannot be loaded and no provider URL can be offered — 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

changing network settings for a local COM activation failure.
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

After it, a different downstream HRESULT is progress and should be recorded as a separate condition.

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